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1.
Biochem Biophys Res Commun ; 609: 163-168, 2022 06 18.
Artículo en Inglés | MEDLINE | ID: mdl-35436627

RESUMEN

INTRODUCTION: We propose that MuSC-derived myoblasts in PAD have transcriptomic differences that can highlight underlying causes of ischemia-induced myopathy. METHODS: Differentiation capacity among perfused and ischemic human myoblasts was compared. Following next generation sequencing of mRNA, Ingenuity Pathway Analysis (IPA) was performed for canonical pathway enrichment. Live cell imaging and immunofluorescence were performed to determine myocyte fusion index and protein expression based on insights from IPA, specifically concerning cell cycle regulators including cell-division cycle protein 2 (CDC2) and polo-like kinase 1 (PLK1). RESULTS: Ischemic myoblasts formed attenuated myotubes indicative of reduced fusion. Additionally, myoblasts from ischemic segments showed significant differences in canonical pathways associated with PLK1 (upregulated) and G2/M DNA damage checkpoint regulation (downregulated). PLK1 inhibition with BI2536 did not affect cell viability in any group over 24 h but deterred fusion more significantly in PAD myoblasts. Furthermore, PLK1 inhibition reduced the expression of checkpoint protein CDC2 in perfused but not ischemic cells. CONCLUSION: Differentiating myoblasts derived from ischemic muscle have significant differences in gene expression including those essential to DNA-damage checkpoint regulation and cell cycle progress. DNA-damage checkpoint dysregulation may contribute to myopathy in PAD.


Asunto(s)
Proteína Quinasa CDC2/metabolismo , Proteínas de Ciclo Celular , Enfermedad Arterial Periférica , Ciclo Celular , Proteínas de Ciclo Celular/metabolismo , ADN , Daño del ADN , Humanos , Mitosis , Mioblastos/metabolismo , Proteínas Serina-Treonina Quinasas , Proteínas Proto-Oncogénicas , Quinasa Tipo Polo 1
2.
J Control Release ; 335: 203-215, 2021 07 10.
Artículo en Inglés | MEDLINE | ID: mdl-34019947

RESUMEN

Kinetoplastids are infamous parasites that include trypanosomes and Leishmania species. Here, we developed an anti-Leishmania nano-drug using ultra-small functional maghemite (γ-Fe2O3) nanoparticles (NPs) that were surface-doped by [CeLn]3/4+ to enable effective binding of the polycationic polyethylenebyimine (PEI) polymer by coordinative chemistry. This resulting nano-drug is cytolytic in-vitro to both Trypanosoma brucei parasites, the causative agent of sleeping sickness, as well as to three Leishmania species. The nano-drug induces the rupture of the single lysosome present in these parasites attributed to the PEI, leading to cytolysis. To evaluate the efficacy of a "cream-based" version of the nano-drug, which was termed "Nano-Leish-IL" for topical treatment of cutaneous leishmaniasis (CL), we developed a rapid screening method utilizing T. brucei parasites involved in social motility and demonstrated that functional NPs arrested the migration of the parasites. This assay presents a surrogate system to rapidly examine the efficacy of "cream-based" drugs in topical preparations against leishmaniasis, and possibly other dermal infectious diseases. The resulting Nano-Leish-IL topical preparation eliminated L. major infection in mice. Thus, this study presents a novel efficient nano-drug targeting the single lysosome of kinetoplastid parasites.


Asunto(s)
Leishmaniasis Cutánea , Nanocompuestos , Preparaciones Farmacéuticas , Animales , Compuestos Férricos , Hierro , Leishmaniasis Cutánea/tratamiento farmacológico , Ratones , Óxidos
3.
Chirurg ; 91(10): 823-832, 2020 Oct.
Artículo en Alemán | MEDLINE | ID: mdl-32691082

RESUMEN

BACKGROUND: Periprosthetic acetabular fractures are an increasing severe complication in revision arthroplasty. A differentiation is made between periprosthetic acetabular fractures (acute/traumatic fractures) and insufficiency fractures (chronic fractures). OBJECTIVE: This article introduces a novel treatment algorithm that provides assistance in therapeutic decision making for implant selection and the anchoring philosophy based on diagnostic decision criteria and the relevant load-bearing osseous structures, taking the defect situation into account. MATERIAL AND METHODS: The article provides an overview of original and review articles. RESULTS: The essential criteria for decisions in treatment planning are based on the stability of the primary cup, the load-bearing ability of the main anatomical structures and the resulting defect situation. For insufficiency fractures the reason for the revision and therefore the exclusion of periprosthetic joint infections (PJI) must additionally be considered. In the case of proven PJI a two-stage or multistage prosthesis exchange must be carried out. Based on the extent of apparent bony defects and pelvic discontinuity, the spectrum of treatment options ranges up to implantation of individual patient custom-made acetabular components. DISCUSSION/CONCLUSION: This overview introduces a new treatment algorithm that provides assistance in decision making for traumatic periprosthetic acetabular fractures and insufficiency fractures. It also provides decision criteria for selection of implants and the surgical approach. Due to the complexity of revision arthroplasty often requiring specialized expertise in trauma and orthopedic surgery and experienced revision surgeons, the operative treatment of periprosthetic acetabular fractures should only be carried out in specialized orthopedic and trauma surgery centers with appropriate experience.


Asunto(s)
Artroplastia de Reemplazo de Cadera , Prótesis de Cadera/efectos adversos , Fracturas Periprotésicas/etiología , Fracturas Periprotésicas/cirugía , Acetábulo/cirugía , Humanos , Reoperación
4.
Diagn Interv Imaging ; 97(2): 203-9, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26282051

RESUMEN

PURPOSE: To assess the incidence and presentation of ipsilateral cancer recurrences (ICR) after deep inferior epigastric perforator (DIEP) flap reconstruction for breast cancer. PATIENTS AND METHODS: Data of 247 consecutive women with DIEP flap reconstruction after breast cancer in our institution between 1997 and 2009 were retrospectively reviewed. RESULTS: Mean follow-up time was 4.1years±3.2 (SD) (median: 3years; range: 1month - 14years). Thirty-one patients (12.5%, 95%CI: =8.7-17.3) presented 34 relapses, in average 4.1years±2.6 after mastectomy: 14 (41%) were ipsilateral, 6 (18%) contralateral and 14 (41%) metastatic. ICRs occurred earlier (3.9 vs. 5.8years; P<0.05) than non-ICRs. Most ICRs (10/14, 71%) involved the periphery of the flap and presented as palpable nodules. The remaining (4/14, 29%) involved the axilla and 3/4 (75%) were palpable. Imaging procedures detected infra-clinical ICRs in 3 of 10 imaged patients (30%). CONCLUSION: ICRs after DIEP flap reconstruction are more frequent than contralateral recurrences suggesting the need for imaging follow-up of the reconstructed breast.


Asunto(s)
Neoplasias de la Mama/diagnóstico por imagen , Neoplasias de la Mama/epidemiología , Mamoplastia/métodos , Mamografía , Neoplasias Primarias Secundarias/diagnóstico por imagen , Neoplasias Primarias Secundarias/epidemiología , Colgajo Perforante , Adulto , Anciano , Neoplasias de la Mama/cirugía , Femenino , Humanos , Incidencia , Persona de Mediana Edad , Estudios Retrospectivos
5.
J Forensic Sci ; 56 Suppl 1: S162-5, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21198610

RESUMEN

We explored the quality distribution of ninhydrin-developed prints on A4 bond paper in two groups of individuals, in Israel and in India. While the quality distributions of the developed marks in both countries had some dissimilarities, both groups showed the expected bell-shape distribution, with the majority of the donors belonging to the central zone, defined as "average" or "good." Attempt was made to correlate between a physiological feature, palmar moisture, and the fingerprint donorship. As a rule, high fingermark quality could be associated with sweating hands, but there were individuals with moist palms whose fingermarks had a low score and vice versa. This finding supports the logical but hitherto unproven assumption that besides the amount of palmar sweat, the other physiological factor governing the prints' quality is the total amount of substrate, amino acids in this case, in the latent deposits, which depends on the substrate concentration in the sweat.


Asunto(s)
Dermatoglifia , Sudor , Femenino , Humanos , India , Indicadores y Reactivos , Israel , Masculino , Ninhidrina , Fenómenos Fisiológicos de la Piel
6.
Ann Oncol ; 21(4): 826-832, 2010 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19825883

RESUMEN

BACKGROUND: B cells are potential sites for latency and reactivation of the human neurotropic JC polyomavirus (JCV). We investigated JCV and Epstein-Barr virus (EBV) status in peripheral blood lymphocytes (PBL) from 74 Hodgkin's lymphoma (HL) and 91 B-cell non-Hodgkin's lymphoma (B-NHL) patients. PATIENTS AND METHODS: JCV and EBV DNA were assessed by PCR, and FISH technique was used to localize viral infection and to estimate chromosomal instability (rogue cells, 'chromosomal aberrations') throughout evolution. The influence of viral infection and chromosomal instability on freedom from progression (FFP) was investigated in HL patients. RESULTS: PCR product sequencing of PBL identified JCV in 42 (57%) circulating lymphocytes of HL patients. FISH analysis revealed that the presence of cells with a high JCV genome copy number--associated to the presence of rogue cells and 'higher frequency of chromosomal aberrations'--increased from 15% before treatment to 52% (P < 10(-5)) after. The co-activation of JCV and EBV was independent of known prognostic parameters and associated with a shorter FFP (JCV and EBV co-activation P < 0.001, rogue cells P < 0.002). CONCLUSION: In HL, JCV activation and chromosomal instability have been identified in PBL and associated with a poorer prognosis, especially in EBV+.


Asunto(s)
Inestabilidad Cromosómica , Enfermedad de Hodgkin/diagnóstico , Enfermedad de Hodgkin/genética , Virus JC/fisiología , Linfocitos/metabolismo , Infecciones por Polyomavirus/genética , Infecciones Tumorales por Virus/genética , Adolescente , Adulto , Anciano , Secuencia de Bases , Inestabilidad Cromosómica/genética , Inestabilidad Cromosómica/fisiología , Infecciones por Virus de Epstein-Barr/complicaciones , Infecciones por Virus de Epstein-Barr/epidemiología , Infecciones por Virus de Epstein-Barr/genética , Femenino , Herpesvirus Humano 4/fisiología , Enfermedad de Hodgkin/sangre , Enfermedad de Hodgkin/complicaciones , Humanos , Linfocitos/patología , Masculino , Persona de Mediana Edad , Datos de Secuencia Molecular , Infecciones por Polyomavirus/sangre , Infecciones por Polyomavirus/complicaciones , Infecciones por Polyomavirus/epidemiología , Prevalencia , Pronóstico , Estudios Retrospectivos , Infecciones Tumorales por Virus/sangre , Infecciones Tumorales por Virus/complicaciones , Infecciones Tumorales por Virus/epidemiología , Adulto Joven
7.
Br J Haematol ; 131(4): 468-71, 2005 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-16281936

RESUMEN

Sinonasal lymphoma (SL) is a rare form of extranodal lymphoma. Of 33 SL cases, 14 consecutive diffuse large B-cell lymphomas were treated with CHOP (adriamycin, cyclophosphamide, vincristine and prednisone) or CHOP-like chemotherapy regimen. Ten achieved complete remission (CR) and three achieved a partial remission. With a median follow-up period of 80 months, seven patients relapsed or progressed [one case including central nervous system (CNS) progression]. Four of the relapses involved the CNS. Eight patients were alive, including seven in CR and six patients had died of their lymphoma. This observation strongly suggests that CNS prophylaxis should be used in SL.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Linfoma de Células B/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Neoplasias de los Senos Paranasales/tratamiento farmacológico , Adulto , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Ciclofosfamida/administración & dosificación , Progresión de la Enfermedad , Supervivencia sin Enfermedad , Doxorrubicina/administración & dosificación , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Prednisona/administración & dosificación , Pronóstico , Recurrencia , Resultado del Tratamiento , Vincristina/administración & dosificación
8.
Talanta ; 67(2): 328-33, 2005 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-18970172

RESUMEN

Handling of a gun results in the formation of invisible impressions, caused by transfer of iron traces to the skin surface. Visualization of these impressions is possible by spraying the palms with a solution of 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (PDT), which forms a magenta complex with iron(II) residues. Hence, mark intensity is directly related to the amounts of iron transferred to the palm. Palmar sweat plays a major role in iron transfer from the firearm to the hand. More factors, however, are involved in this process. Three time-dependent factors have been studied with relation to their effect on the developed mark: the gripping duration of the weapon; the time elapsed from the contact; and the rate of iron dissolution in aqueous solutions containing sweat components in physiological concentrations. We found that the amounts of iron transferred to the palm depend on both, the gripping period and the levels of palmar moisture. Thus, only a few seconds of gripping were required for developing good marks (corresponding to 80ngcm(-2) of iron) on highly-moistured hands, much longer gripping periods were necessary for developing marks of similar intensity on relatively dry hands. Experiments that aimed at studying the effect of sweat components on metallic iron dissolution were carried out in aqueous solutions. It was found that chloride ions in physiological concentrations remarkably enhanced the dissolution, while l-serine, the major amino acid in palmar sweat, had a detrimental effect on this process. Urea, another sweat component, had only a minor effect on the dissolution rate.

9.
J Forensic Sci ; 49(6): 1215-9, 2004 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-15568692

RESUMEN

Quantitative data are reported for the first time on the amounts of iron, which are transferred to the hand upon holding a firearm. Iron levels between 21-315 ng/cm2 were found on volunteers' palms after a single holding of a handgun. Determination of the iron traces was accomplished spectrophotometrically using 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (PDT) as a complexing agent. The transfer of iron from firearms to the palm was found to be, by and large a chemical (dissolution) rather than mechanical dislodgement. The prime factor that determines the amount of iron transferred from the firearm to the hand is the moisture level on the palm. These findings are likely to be of importance in courts of law, as well as in the war against terrorism and serious crime.


Asunto(s)
Compuestos Ferrosos/análisis , Armas de Fuego , Piel/química , Sudor/química , Femenino , Balística Forense/métodos , Mano , Humanos , Indicadores y Reactivos/química , Masculino , Estructura Molecular , Espectrofotometría , Triazinas/química
10.
Skin Res Technol ; 9(4): 306-11, 2003 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-14641880

RESUMEN

BACKGROUND/PURPOSE: Humectancy or hygroscopy is the water absorption tendency of a substance from the surroundings. Our interest, from the clinical point of view, consists of correlating this tendency in vitro and its effect in vivo for the development of drugs and formulations for the treatment of dry skin syndrome or diseases accompanied by dry skin. METHOD: In vitro, water absorption was measured using the comparative isopiestic method. This method is based on bringing the vapor of the water to isothermal equilibrium between a reference system and the material to be studied. The in vivo model on guinea-pigs for the dry skin syndrome tested the therapeutic ability of mono-, di- and tri-glycerols to provide moisture to dry skin leading to healing. The moisture content in the stratum corneum was measured with a Corneometer CM 825 PC that measures merely the presence of high dielectric material (humectant or water), whereas the Mexameter MX 16 measures a pathological parameter - the erythema. RESULTS: Adding hydroxyl groups to a consecutive set of polyhydroxyalkanes increases the humectancy of the polyols in vitro. This elevation was found to be linear at low relative humidities (Relative humidity=31.9% and 37 degrees C). In vivo, moisture was returned to normal within a week in all three groups. However, only glycerol managed to abolish the erythema within 7 days. CONCLUSION: A rise in water absorption ability in vitro, at a rate of about 0.25 mol water per hydroxyl group was revealed in a consecutive set of glycerols (mono-, di- and tri-glycerols). One would expect that the better humectant is a material, i.e. in which the higher its physical ability to hold water in vitro the more effective it will be in recovering skin dryness. We have found, however, that glycerol, which has the lowest humectant activity in vitro, from the set of glycerols, di- and tri-glycerol, has been proven to be the best for eliminating the signs of skin dryness. Accordingly, we propose to distinguish between the in vitro humectancy (i.e. the water uptake of a material), and its in vivo moisturizing effect, i.e. its ability to cure skin dryness and erythema. This finding supports our conclusion that the connection between in vitro humectancy and in vivo moisturization is not a simple correlation.


Asunto(s)
Glicerol/uso terapéutico , Queratolíticos/uso terapéutico , Enfermedades de la Piel/tratamiento farmacológico , Animales , Modelos Animales de Enfermedad , Glicerol/farmacología , Cobayas , Queratolíticos/farmacología , Enfermedades de la Piel/metabolismo , Agua/metabolismo , Pérdida Insensible de Agua/efectos de los fármacos
11.
J Fr Ophtalmol ; 26(9): 960-6, 2003 Nov.
Artículo en Francés | MEDLINE | ID: mdl-14631281

RESUMEN

Following a recent case of bilateral perforating ocular trauma by multiple pellets, the authors reviewed pellet traumatisms treated in the Emergency Department and operated on in the Ophthalmology Department of the Villeneuve-St-Georges Hospital over the past 15 years. At close range, pellet weapon shootings can generate lid, conjunctiva, and powder cornea tattoos; in these cases, the lesions are often unilateral. Shooting at longer range does not result in corneodermic tattoos, but because pellets scatter, binocular lesions frequently occur. The different lesions caused by these nonmagnetic foreign bodies are often very serious. An early, even very early, traumatic cataract is sometimes very difficult to treat in these polytraumatized eyes. The visual prognosis is more reserved, as the impact zones often involve the posterior pole and the macular area. The best recovered visual acuity is 30-35/20, with visual field alterations, but the injury to the eyeball by multiple pellets can generate globe atrophy. The authors stress the gravity of these ocular traumas, fortunately rarer but not completely eradicated since the law of May 6, 1995, which restricted the possession of these pellet guns.


Asunto(s)
Lesiones Oculares Penetrantes/etiología , Heridas por Arma de Fuego/etiología , Adolescente , Adulto , Catarata/etiología , Catarata/terapia , Niño , Preescolar , Servicio de Urgencia en Hospital/estadística & datos numéricos , Tratamiento de Urgencia/métodos , Lesiones Oculares Penetrantes/diagnóstico , Lesiones Oculares Penetrantes/epidemiología , Lesiones Oculares Penetrantes/terapia , Femenino , Armas de Fuego/clasificación , Armas de Fuego/legislación & jurisprudencia , Armas de Fuego/estadística & datos numéricos , Angiografía con Fluoresceína , Francia/epidemiología , Humanos , Masculino , Persona de Mediana Edad , Atrofia Óptica/etiología , Pronóstico , Sistema de Registros , Resultado del Tratamiento , Agudeza Visual , Campos Visuales , Heridas por Arma de Fuego/diagnóstico , Heridas por Arma de Fuego/epidemiología , Heridas por Arma de Fuego/terapia
12.
J Fr Ophtalmol ; 26(8): 819-23, 2003 Oct.
Artículo en Francés | MEDLINE | ID: mdl-14586223

RESUMEN

The authors report a case of bilateral eye lesions with extended visual sequelae after the inflation of a driver's airbag during a head-on collision. The superficial facial lesions were accompanied by bilateral eye lesions, reaching both the anterior and posterior segments. Bilateral periorbital palpebral hematomas; voluminous bipalpebral edema combined with severe -conjunctival edema, corneal erosions, and edema; bilateral hyphema; pupillary changes with multiple iris sphincter breaks and weak pupillary light reflex only on the right eye; retrocession of the iridocorneal angle; and on fundus examination both retinas had posterior and peripheral hemorrhages and Berlin retinal edema. Five years after the trauma and 4 years after posttraumatic surgery for cataract that had progressively appeared on the left eye, the visual acuity is 25/20 in both eyes notwithstanding a small paracentral scotoma related to a break in the Bruch membrane. A review of the literature shows several types of ophthalmological lesions related to the airbag mechanism, which after combustion of an alkaline powder inflates at a very high speed, resulting in a risk of corneal-conjunctive-palpebral alkaline burns added to an eye contusion, which may be responsible for severe lesions. The American studies distinguish three factors affecting the seriousness of these airbag accidents: (a) wearing glasses, (b) position and size of the driver, and (c) inflation force of the airbag. Wearing a seatbelt is mandatory to minimize the violence of the oculofacial impact. After facial trauma from an airbag, an ophthalmological examination is necessary to assess of the chemical burns of the tissues exposed to the alkaline powder and possible major ocular lesions.


Asunto(s)
Airbags/efectos adversos , Quemaduras Químicas/etiología , Catarata/etiología , Quemaduras Oculares/inducido químicamente , Lesiones Oculares/etiología , Adulto , Quemaduras Químicas/diagnóstico , Catarata/diagnóstico , Edema Corneal/etiología , Urgencias Médicas , Quemaduras Oculares/diagnóstico , Hemorragia del Ojo/etiología , Lesiones Oculares/diagnóstico , Angiografía con Fluoresceína , Estudios de Seguimiento , Humanos , Hipema/etiología , Masculino , Factores de Tiempo , Agudeza Visual
13.
J Med Liban ; 49(6): 333-7, 2001.
Artículo en Francés | MEDLINE | ID: mdl-12744636

RESUMEN

To estimate the incidence of pleural mesothelioma and its relationship with the occupational and environmental exposure to asbestos in Chekka region. Between 1991 and 2000, 22 cases of malignant mesothelioma were diagnosed at Hôtel-Dieu de France Hospital. Eighteen cases were epidemiologically investigated. Fifteen among these 18 patients (83%) had a positive exposure history: exposure was occupational in 11 cases and environmental in 4 cases. The tumor was attributable to Eternit Company in 12 cases among the exposed 15 (80%). These 12 cases were secondary to occupational exposures in 8 and to environmental exposure in 4 cases. Mean latency period between exposition and diagnosis was 29 years. Fifteen patients died from the progression of their disease after a median survival of 8 months. The relationship between pleural mesothelioma and Eternit Company with the related occupational and environmental risk in Chekka region is obvious. The assessment of the incidence needs a national cancer registry. Despite the protective measures taken by the government since 1996, an increase in the incidence is suspected in the coming ten years because of the long latency period of the disease.


Asunto(s)
Asbestosis/epidemiología , Exposición a Riesgos Ambientales/efectos adversos , Mesotelioma/epidemiología , Exposición Profesional/efectos adversos , Neoplasias Pleurales/epidemiología , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Incidencia , Líbano/epidemiología , Masculino , Mesotelioma/terapia , Persona de Mediana Edad , Neoplasias Pleurales/terapia
14.
J Med Liban ; 48(5): 298-301, 2000.
Artículo en Francés | MEDLINE | ID: mdl-12494911

RESUMEN

Chronic diarrhea is an important clinical problem in patients infected with HIV. Data assessing the diagnostic yield of upper and lower endoscopy are limited. We reported 10 cases of HIV-infected patient referred to our hospital for chronic diarrhea from March 1995 to June 1999. 60% of the pathogens were identified obviously by stool studies. Cryptosporidium and Mycobacterium avium intracellulare (MAI) were the most common organisms. In this study, endoscopy identified 2 additional cases of MAI and one of 5 cryptosporidia detected in stool. Immunologic test identified a CMV infection in one case. Stool tests and endoscopy identified obviously 80% of the pathogens. Most investigators and us agree that stool studies should be the first diagnostic test. In patients with negative stool studies, lower endoscopy is more cost-effective than upper endoscopy and indicated as an initial exam.


Asunto(s)
Cryptosporidium/aislamiento & purificación , Heces/microbiología , Heces/parasitología , Enteropatía por VIH/diagnóstico , Complejo Mycobacterium avium/aislamiento & purificación , Animales , Colonoscopía , Femenino , Enteropatía por VIH/microbiología , Enteropatía por VIH/parasitología , Humanos , Masculino
15.
Eur Psychiatry ; 10(4): 211-2, 1995.
Artículo en Inglés | MEDLINE | ID: mdl-19698342
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