Subject(s)

Hemoglobins, Abnormal/genetics , Amino Acid Substitution , Belgium/epidemiology , Belgium/ethnology , Brazil/ethnology , Chromatography, High Pressure Liquid , Family Health , Globins/chemistry , Globins/genetics , Humans , Infant, Newborn , Isoelectric Focusing , Neonatal Screening , Point Mutation , Twins/genetics