the group consisted of 22 individuals with homozygous sickle-cell anaemia ( hb ss ) , 12 with sickle-cell/beta-thalassaemia double heterozygosity , 34 with sickle-cell/haemoglobin c disease ( hb sc ) , and two with the combination of haemoglobin s and hereditary persistence of fetal haemoglobin .
C0002895
hb ss
C0019034
sickle-cell/haemoglobin c disease