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1.
Epilepsy Behav Rep ; 19: 100546, 2022.
Article in English | MEDLINE | ID: mdl-35637976

ABSTRACT

We describe a complex family with two couples (two sisters who married two brothers) with consistent social and neuropsychiatric problems, originally from Sardinia. Each couple had three daughters, which shared electroclinical epileptic syndrome and developmental disorders. All patients suffered from mild to moderate intellectual disability, speech difficulties and behavioural disorders. Four out of six patients had epilepsy onset between 3 and 4 years of age. The epileptic history almost reflected the typical clinical course of a self-Limited Focal Epilepsy of Childhood. However, our patients don't have the complete features characteristic of one of the four specific self-Limited Focal Epilepsies of Childhood; a progressive evolution into a Developmental and/or Epileptic Encephalopathy with spike-wave activation in sleep was observed in the two older sister of the first family, which developed more severe developmental disorder too. In the other epileptic patients, improvement of EEG pattern was not coincident with an improvement of the developmental disorders. Brain MRI, performed in three patients, showed normal findings. Genetic analysis carried out so far (SNP-array, study of Runs of homozygosity, FMR1 triplet-repeat primer-PCR assay, Next Generation Sequencing based gene panel for epilepsy and neurodevelopmental disorders and Exome Sequencing), did not provide useful elements for an aetiological diagnosis.

2.
J Neurol Sci ; 386: 19-22, 2018 03 15.
Article in English | MEDLINE | ID: mdl-29406960

ABSTRACT

BACKGROUND: Several correlations between cognitive impairment (CI), radiologic markers and cognitive reserve (CR) have been documented in MS. OBIECTIVE: To evaluate correlation between CI and brain volume (BV) considering CR as possibile mitigating factor. METHODS: 195 relapsing MS patients underwent a neuropsychological assessment using BICAMS. BV was estimated using SIENAX to obtain normalized volume of brain (NBV), white matter (NWV), gray matter (NGV) and cortical gray matter (CGV). CR was estimated using a previously validated tool. RESULTS: Pearson test showed a correlation between the symbol digit modality test (SDMT) score and NBV (r=0.38; p<0.000) NGV(r=0.31; p<0.000), CGV (r=0.35; p<0.000) and CRI score(r=0.42; p<0.000). Linear regression (dependent variable:SDMT) showed a relationship with CR scores (p=0.000) and NGV(p<0.000). A difference was detected between cognitive impaired and preserved patients regarding mean of NBV(p=0.002), NGV(p=0.007), CGV(p=0.002) and CR Scores (p=0.007). Anova showed a association between the presence of CI (dependent variable) and the interaction term CRIQ × CGV (p=0.004) whit adjustment for age and disability evaluated by EDSS. CONCLUSIONS: Our study shows a correlation between cognition and BV, in particular gray matter volume. Cognitive reserve is also confirmed as an important element playing a role in the complex interaction to determine the cognitive functions in MS.


Subject(s)
Brain/pathology , Cognition Disorders/etiology , Cognition Disorders/pathology , Cognitive Reserve/physiology , Multiple Sclerosis/complications , Adult , Brain/diagnostic imaging , Cognition Disorders/diagnostic imaging , Disability Evaluation , Female , Humans , Image Processing, Computer-Assisted , Magnetic Resonance Imaging , Male , Middle Aged , Multiple Sclerosis/diagnostic imaging , Multiple Sclerosis/drug therapy , Neuropsychological Tests , Regression Analysis
3.
Clin Genet ; 93(2): 223-227, 2018 02.
Article in English | MEDLINE | ID: mdl-28644547

ABSTRACT

Congenital adrenal hyperplasia due to 21-hydroxylase deficiency (21OHD-CAH) is an autosomal recessive disorder affecting steroidogenesis, due to mutations in CYP21A2 (6p21.3). 21OHD-CAH neonatal screening is based on 17-hydroxyprogesterone (17OHP) serum levels, showing high type I error rate and low sensitivity to mild CAH forms. Here, we used an epidemiological approach, which estimates the allelic frequency (q) of an autosomal recessive disorder using the proportion of homozygous patients, the mutational spectrum and the inbreeding coefficient in a sample of affected individuals. We applied this approach to 2 independent Italian cohorts of patients with both clinical and molecular diagnosis of 21OHD-CAH from mainland Italy (N = 240) and Sardinia (N = 53). We inferred q estimates of 2.87% and 1.83%, corresponding to a prevalence of 1/1214 and 1/2986, respectively. CYP21A2 mutational spectra were quite discrepant between the 2 cohorts, with V281L representing 74% of all the mutations detected in Sardinia vs 37% in mainland Italy. These findings provide an updated fine-grained picture of 21OHD-CAH genetic epidemiology in Italy and suggest the need for a screening approach suitable to the detection of the largest number of clinically significant forms of CAH.


Subject(s)
Adrenal Hyperplasia, Congenital/genetics , Molecular Epidemiology , Steroid 21-Hydroxylase/genetics , Adolescent , Adrenal Hyperplasia, Congenital/epidemiology , Adrenal Hyperplasia, Congenital/pathology , Child , Child, Preschool , Female , Gene Frequency , Genotype , Humans , Infant , Infant, Newborn , Italy/epidemiology , Male , Neonatal Screening , Point Mutation
4.
Horm Metab Res ; 30(9): 575-80, 1998 Sep.
Article in English | MEDLINE | ID: mdl-9808327

ABSTRACT

Leptin can be considered as a peripheral signal which informs the centers about the mass of energy stores. Studies done on the human adult population have demonstrated that degree of adiposity and insulin levels play a major role as determinants of leptin circulating levels. The aim of this study was to evaluate which factors may influence leptin levels at birth. We examined the role played by baby size and by the metabolic environment the fetus was exposed to during pregnancy. We considered 85 newborns from normal (n = 60), gestational (GDM, n = 17) and pregestational (IDDM = 8) diabetes mellitus mothers. At delivery, blood was taken from the umbilical cord vein. Babies from normal and GDM mothers were subdivided into AGA (appropriate for gestational age) and LGA (large for gestational age). There was no difference in leptin levels between babies from normal or GDM mothers belonging to the same weight category, but leptin levels were always higher in LGA than in AGA newborns, and highly correlated with birth weight (r = 0.34, P = 0.001). Moreover, IDDM mothers gave birth to newborns with significantly higher levels of leptin and insulin when compared with normal and GDM mothers. Diabetes of both GDM and IDDM mothers was clinically well controlled (HbA1c was 4.0 and 7.2, respectively). The correlation between leptin and insulin was significant only when newborns from IDDM mothers were included in the regression analysis (r = 0.39, P = 0.0002). Our results suggest that degree of adiposity is one of the main regulators of leptin concentration in the human newborn and that babies exposed to an altered, though clinically controlled, metabolic environment, as in IDDM mothers, have increased levels of leptin.


Subject(s)
Diabetes Mellitus, Type 1/blood , Diabetes, Gestational/blood , Proteins/metabolism , Adipose Tissue/metabolism , Adult , Birth Weight , Blood Glucose , C-Peptide/blood , Female , Glycated Hemoglobin/analysis , Humans , Infant, Newborn , Insulin/blood , Insulin-Like Growth Factor Binding Protein 1/blood , Insulin-Like Growth Factor I/metabolism , Leptin , Multivariate Analysis , Pregnancy , Regression Analysis , Testosterone/blood
5.
Brain Res Mol Brain Res ; 45(2): 345-8, 1997 May.
Article in English | MEDLINE | ID: mdl-9149112

ABSTRACT

The rat tyrosine hydroxylase gene (TH) from a panel of outbred and inbred rat strains has been analysed by Southern blotting, restriction-endonuclease mapping and direct sequencing of PCR-amplified products for detecting DNA polymorphisms. Five polymorphic sites have been characterized. This information may be used in pharmacogenetic studies to determine the influence of the TH gene in animal models of affective disorders and addictive behaviours.


Subject(s)
Polymorphism, Genetic , Rats/genetics , Tyrosine 3-Monooxygenase/genetics , Animals , Base Sequence , DNA Primers , Introns , Molecular Sequence Data , Polymerase Chain Reaction , Rats, Inbred F344 , Rats, Inbred Lew , Rats, Sprague-Dawley , Rats, Wistar , Tyrosine 3-Monooxygenase/biosynthesis
6.
Ann Ist Super Sanita ; 33(3): 407-10, 1997.
Article in English | MEDLINE | ID: mdl-9542272

ABSTRACT

This retrospective study investigates the clinical characteristics of gestational diabetes mellitus (GDM) (time of diagnosis, different treatment, metabolic parameters, etc.) in relation to prepregnancy body mass index (BMI) and the influence of BMI on neonatal outcome. 93 GDM women and 110 control subjects were divided into three groups in relation to their prepregnancy BMI: normalweight (Nw), overweight (Ow) and obese (Ob). GDM was diagnosed significantly (p < 0.01) earlier in Ow and Ob than in Nw. Preterm deliveries and cesarean sections resulted significantly (p < 0.01) increased in all BMI categories of GDM respect to matched controls. Prevalence of neonatal macrosomia was higher in GDM patients (44.6%) compared with normal controls (15.4%) and correlated (p < 0.01) with prepregnancy BMI in both groups. Nevertheless in each BMI category the prevalence of macrosomia was significantly higher in GDM patients. The body weight increase during pregnancy was not associated with neonatal macrosomia. This study shows that prepregnancy BMI is an important risk factor for GDM and is predictive for macrosomia specially in women suffering from GDM.


Subject(s)
Birth Weight/physiology , Fetal Macrosomia/etiology , Pregnancy in Diabetics/physiopathology , Adult , Female , Fetal Macrosomia/pathology , Humans , Infant, Newborn , Pregnancy , Pregnancy in Diabetics/pathology , Retrospective Studies
7.
Int J Obes Relat Metab Disord ; 20(5): 445-9, 1996 May.
Article in English | MEDLINE | ID: mdl-8696423

ABSTRACT

OBJECTIVE: To evaluate in a selected population the clinical characteristics (time of diagnosis, different treatment, metabolic parameters, etc.) of gestational diabetes in relation to prepregnancy body mass index (BMI) and the influence of BMI on neonatal outcome. DESIGN: This study was retrospectively led using a computerized data system for all deliveries that occurred at the Departments of Obstetrics and Gynecology of the University of Pisa (Italy) from 1 January 1987 to 31 December 1992. SUBJECTS: 93 women with GDM and 110 control subjects divided into three groups according to their pre-pregnancy BMI: normal weight (Nw), overweight (Ow) and obese (Ob). MEASUREMENTS: Time of diagnosis, mode of treatment and metabolic control of GDM; time and mode of delivery, neonatal outcome (macrosomia, respiratory distress syndrome, hyperbilirubinemia, hypoglycemia, polycythemia, hypocalcemia). RESULTS: GDM was diagnosed earlier in Ow and Ob than in Nw (p < 0.01) and insulin treatment was used in 86% of Ob-GDM, 91% of Ow-GDM and in 77% of Nw-GDM women (p < 0.001). Preterm deliveries and cesarean sections resulted significantly increased in all BMI categories of GDM patients with respect to matched normal controls. Prevalence of neonatal macrosomia was higher in GDM patients (44.6%) compared with normal controls (15.4%) and correlated (p > 0.01) with prepregnancy BMI in both groups. The body weight increase during pregnancy was not associated with neonatal macrosomia. CONCLUSIONS: The degree of overweight is associated with an earlier diagnosis of GDM; prepregnancy BMI is more predictive of macrosomia than weight gain, both in control and GDM women; GDM seems to play the most important role in increasing the possibility of the occurrence of macrosomia.


Subject(s)
Body Mass Index , Diabetes, Gestational , Pregnancy Outcome , Diabetes, Gestational/diagnosis , Diabetes, Gestational/drug therapy , Female , Fetal Macrosomia/etiology , Humans , Hyperbilirubinemia/etiology , Infant, Newborn , Insulin/therapeutic use , Pregnancy , Weight Gain
8.
Genomics ; 23(2): 352-61, 1994 Sep 15.
Article in English | MEDLINE | ID: mdl-7835884

ABSTRACT

In this paper we report the molecular characterization of a large deletion that removes the entire Factor VIII gene in a severe hemophilia A patient. Accurate DNA analysis of the breakpoint region revealed that a large DNA fragment replaced the 300-kb one, which was removed by the deletion. Pulsed-field gel electrophoresis analysis revealed that the size of the inserted fragment is about 550 kb. In situ hybridization demonstrated that part of the inserted region normally maps to Xq21 and to the tip of the short arm of the Y chromosome (Yp). In our patient this locus is present both in Xq21 and in Xq28, in addition to the Yp, being thus duplicated in the X chromosome. Sequence analysis of the 3' breakpoint suggested that an illegitimate recombination is probably the cause of this complex rearrangement.


Subject(s)
Factor VIII/genetics , Hemophilia A/genetics , Sequence Deletion , X Chromosome , Adult , Base Sequence , Chromosome Mapping , Cloning, Molecular , DNA/genetics , Electrophoresis, Gel, Pulsed-Field , Female , Gene Rearrangement , Humans , In Situ Hybridization, Fluorescence , Male , Molecular Sequence Data , Y Chromosome
10.
Br J Haematol ; 81(2): 283-7, 1992 Jun.
Article in English | MEDLINE | ID: mdl-1643026

ABSTRACT

This paper describes a family of Central Italian origin in which three patients in two generations had either thalassaemia intermedia or a late presenting form of thalassaemia major. Sequence analysis of the patients' DNA revealed that only one of the beta-globin genes was affected by a beta-thalassaemia mutation (the codon 39 nonsense mutation), the other being completely normal, apart from the complex rearrangement (-T +ATA) at position -530 5' to the CAP site of the beta-globin gene, which has uncertain clinical significance. Haematologically, all these patients were characterized by unusually low HbF levels (1.8-7.3%) for a beta-thalassaemia major or intermedia phenotype. The mother of the two patients with thalassaemia intermedia was heterozygous for beta-thalassaemia (codon 39 nonsense mutation), while the father had thalassaemia-like red cell indices, an increased alpha/non alpha chain synthesis ratio, a slight increase of HbF and a low HbA2 level, but showed entirely normal beta-globin gene sequences, apart from the complex rearrangement (-T +ATA) at position -530 5' to the CAP site. One of the thalassaemia intermedia patients married a normal woman and they had a child with thalassaemia major who inherited only the codon 39 nonsense mutation but not the complex rearrangement at position -530. The clinical phenotype of thalassaemia-intermedia or major in the patients from this family may be explained by postulating the inheritance of the double heterozygous state for beta-thalassaemia and for a mutation in a gene coding for an erythroid-specific DNA binding protein which may impair the function of the normal beta-globin gene. Heterozygosity for this postulated mutation (father of the patients with thalassaemia intermedia) may result in the production of a beta-thalassaemia carrier state with normal HbA2 level.


Subject(s)
Globins/genetics , Thalassemia/genetics , Adolescent , Adult , Base Sequence , Blotting, Southern , Chromosome Mapping , Codon , Female , Gene Rearrangement/genetics , Humans , Male , Molecular Sequence Data , Mutation/genetics , Pedigree , Phenotype
11.
Br J Haematol ; 80(2): 222-6, 1992 Feb.
Article in English | MEDLINE | ID: mdl-1550780

ABSTRACT

In this study we have investigated the molecular basis for a mild form of beta-thalassaemia in three patients of Italian descent. In two, belonging to different families and affected by a mild and late-presenting form of thalassaemia major, direct sequencing of amplified DNA detected a C----T substitution at position -87 of the beta-globin gene in the compound heterozygous state either with codon 39 nonsense mutation or beta +IVSI, nt 110 mutation. The -87 (C----T) mutation has been previously described, in combination with the beta +IVSI, nt 110 mutation, in a single patient with thalassaemia intermedia. Both our patients showed a more severe phenotype as compared to that resulting from compound heterozygosity for a severe beta-thalassaemia mutation and another promoter mutation (-87, C----G) at the same position. In the third patient with the thalassaemia intermedia phenotype, we detected a novel promoter mutation, consisting in a C----A substitution at position -86, in combination with the codon 39 nonsense mutation. The results of this study indicate that different nucleotide substitutions affecting the proximal CACCC box of the beta-globin gene in combination with severe beta-thalassaemia, produce a mild form of thalassaemia ranging in severity from thalassaemia intermedia to late-presenting thalassaemia major.


Subject(s)
Globins/genetics , Mutation/genetics , Thalassemia/genetics , Adolescent , Base Sequence , Child, Preschool , DNA/chemistry , Female , Humans , Immunoblotting , Male , Middle Aged , Molecular Sequence Data , Pedigree , Polymerase Chain Reaction
12.
Hum Mutat ; 1(2): 124-8, 1992.
Article in English | MEDLINE | ID: mdl-1301199

ABSTRACT

This study describes a patient with a thalassemia intermedia-like phenotype in whom beta-globin gene sequencing detected a novel abnormal hemoglobin (Hb) due to a T-C substitution at codon 114 of the beta-globin gene arising as a de novo mutation. The abnormal variant was designated Hb Brescia after the place of birth of the propositus. Normal sequences were detected at the in trans beta-globin locus. In addition, alpha-globin gene analysis detected a triple alpha-globin locus which was inherited from the father. The T-C change at position 114 of the beta-globin gene results in a leucine to proline substitution (Leu-Pro) in the G-helix. The resulting Hb tetramer is highly unstable and precipitates forming inclusion bodies in the peripheral red blood cells. Moreover, the Leu-Pro substitution interferes negatively with the four alpha 1 beta 1 contact points of the G-helix most likely adversely affecting the alpha beta dimer formation. The very severe phenotype presented by our patient is unusual in a heterozygote for an unstable Hb variant and may be explained by the coinheritance of the triple alpha-globin locus.


Subject(s)
Globins/genetics , Hemoglobins, Abnormal/genetics , Leucine , Proline , beta-Thalassemia/genetics , Adolescent , Base Sequence , Erythrocytes/physiology , Female , Humans , Italy , Macromolecular Substances , Male , Molecular Sequence Data , beta-Thalassemia/blood
14.
Blood ; 79(2): 512-6, 1992 Jan 15.
Article in English | MEDLINE | ID: mdl-1309671

ABSTRACT

We have previously described a family of Northern Sardinian descent in which the propositus was affected by thalassemia major resulting from compound heterozygosity for codon 39 nonsense mutation and the beta +IVS II nt 745 mutation and in which all heterozygotes for the beta +IVS II nt 745 mutation had normal hemoglobin (Hb) A2 levels. To define the reasons for normal HbA2 levels in otherwise typical beta-thalassemia heterozygotes, we cloned and sequenced the delta-thalassemia gene in cis to the beta +IVS II nt 745 mutation. The sequence analysis showed a single nucleotide substitution (G----A) at position 69 nts (delta +69) downstream to the polyA addition site. Dot blot analysis with an oligonucleotide probe complementary to the delta +69 mutation detected this mutation in several heterozygotes for the beta +IVS II nt 745 mutation from the proband's family, but failed to show it either in a group of normal individuals of the same origin or in nonrelated heterozygotes for the beta +IVS II nt 745 mutation of the same or different descent from the proband. The delta +69 (G----A) mutation may be responsible for the low delta-globin output from the beta +IVS II nt 745 chromosome or could be a silent polymorphism not affecting the function of the delta-globin gene. The normal G at position 69 is part of a sequence very similar to the core DNA (A/T)GATA(A/G) motif (GATA box) that is a binding site for the GATA-1 protein. Gel-retardation assay has shown that a DNA fragment containing the GATA motif with the G----A at position +69 has increased binding affinity for erythroid-specific DNA binding protein(s) as compared with the wild-type sequence. These findings may suggest that the delta +69 mutation is responsible for the deficient function of the in cis delta-globin gene.


Subject(s)
DNA-Binding Proteins/metabolism , Globins/genetics , Mutation , Thalassemia/genetics , Transcription Factors/metabolism , Base Sequence , Binding Sites , DNA/chemistry , DNA/genetics , DNA/metabolism , DNA Restriction Enzymes , Erythroid-Specific DNA-Binding Factors , GATA1 Transcription Factor , Humans , Italy , Molecular Sequence Data , Pedigree
17.
Blood ; 77(6): 1342-7, 1991 Mar 15.
Article in English | MEDLINE | ID: mdl-2001456

ABSTRACT

In this study, we have defined by dot-blot analysis with allelic specific oligonucleotide probes or direct sequencing on amplified DNA the beta-thalassemia mutations in a large group of patients (23) of Italian descent with thalassemia intermedia. These patients had one parent with either the silent beta-thalassemia carrier phenotype or borderline-normal hemoglobin A2 (HbA2) levels (2.5% to 3.5%). Nearly all were genetic compounds for a severe beta-thalassemia mutation and a beta-thalassemia mutation associated with high residual output of beta-globin chains (beta + intervening sequence [IVS]-I-nt6, beta -87, beta -101), indicating that inheritance of a mild beta-thalassemia allele, even in a single dose, is the most common molecular mechanism producing thalassemia intermedia in the Italian population. In three cases, in whom we failed to define by dot-blot analysis the mutations, we sequenced the beta + globin gene and found three novel beta-thalassemia mutations, which are certainly very rare because they have been hitherto detected solely in a single patient. These mutations consist of: (1) a T-A substitution at position 2 of IVS-I, in a patient compound heterozygote for this mutation and the -87 promoter mutation; (2) a G-C substitution at position 844 of IVS-II, in a patient heterozygous for this mutation who showed normal sequences at the in trans beta-globin gene (The reason for the presence of clinical manifestations in a beta-thalassemia heterozygote has not been defined.); and (3) a deletion of one nucleotide (-T) at codon 126, resulting in a frameshift and readthrough of the 5' untranslated region and most likely producing an elongated Hb molecule of 156 amino acid residues, in a patient heterozygous for this mutation with normal beta-globin gene sequences at the other locus.


Subject(s)
Mutation/genetics , Thalassemia/genetics , Adult , Autoradiography , Base Sequence , Chromosome Deletion , DNA/genetics , Female , Gene Amplification/genetics , Globins/genetics , Humans , Immunoblotting , Italy/epidemiology , Italy/ethnology , Middle Aged , Molecular Sequence Data , Oligonucleotide Probes , Phenotype , Thalassemia/epidemiology , Thalassemia/pathology
19.
Genomics ; 7(1): 115-8, 1990 May.
Article in English | MEDLINE | ID: mdl-2159433

ABSTRACT

We have characterized an unusual duplication of exon 13 within the factor VIII gene in a patient with a mild form of hemophilia A. This duplication was the result of a nonhomologous breakage and reunion event of two misaligned wild-type chromosomes. Sequence analysis of the breakpoint region revealed the presence of AT-rich sequences and possible topoisomerase I sites, whose involvement in several cases of illegitimate recombination has been postulated.


Subject(s)
Factor VIII/genetics , Hemophilia A/genetics , Multigene Family , Recombination, Genetic , Base Sequence , Cloning, Molecular , DNA Topoisomerases, Type I/metabolism , Exons , Genes , Humans , Molecular Sequence Data , Restriction Mapping
20.
Br J Haematol ; 74(4): 480-6, 1990 Apr.
Article in English | MEDLINE | ID: mdl-2346726

ABSTRACT

This paper describes four families of Italian descent in each of which the propositus had the clinical phenotype of thalassaemia intermedia, resulting from the compound heterozygous state for high HbA2 beta thalassaemia and type I silent beta thalassaemia. Direct sequencing on amplified DNA and/or oligonucleotide analysis detected, in all families but one, the compound heterozygous state for codon 39 nonsense mutation and the C-T substitution at position -101 in the distal CACCC box of the beta-globin gene promoter (beta th-101). Members of these families who are heterozygous for high HbA2 beta thalassaemia showed the codon 39 nonsense mutation, while those with the clinical phenotype of silent beta thalassaemia had the beta th-101 mutation. In the remaining family, the propositus and one of his siblings had the compound heterozygous state for a molecularly undefined high HbA2 beta thalassaemia and the beta th-101 mutation in combination with the triple alpha globin gene arrangement. These patients showed a more severe thalassaemia intermedia like clinical phenotype as compared to those with the same beta-globin genotype and a normal alpha-globin gene arrangement. In the families investigated the beta th-101 was always associated with haplotype I. A group of patients with thalassaemia intermedia from Southern Italy, either homozygous or heterozygous for haplotype I and in whom previous studies had failed to define the mutation in one of the beta thalassaemia globin genes, were screened by oligonucleotide analysis for the presence of the beta th-101. Three out of nine were positive. These results indicate that the beta th-101 mutation is a common cause of the type I silent beta thalassaemia phenotype in the Southern Italian population.


Subject(s)
Globins/genetics , Heterozygote , Mutation , Promoter Regions, Genetic/genetics , Thalassemia/genetics , Child , Female , Gene Amplification , Humans , Italy , Male , Pedigree , Thalassemia/ethnology
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