six patients with severe disease had one of the following three beta-thalassaemia determinants : ivs-1 position 110 g -- -- a , exon 2 codon 39 c -- -- t , and ivs-1 position 1 g -- -- a , while the three patients with mild disease had the portuguese type of thalassaemia which is caused by the t -- -- c substitution at position 6 of the ivs-1 .
C0005283
beta-thalassaemia
C0039730
thalassaemia