[1] Thalassemia Soc Pakistan, Lahore, Pakistan
[2] Leeds NHS Teaching Hosp Trust, Yorkshire Reg Genet Serv, Leeds, W Yorkshire, England
[3] Punjab Thalassaemia Prevent Project, Lahore, Pakistan
[4] Hlth Dept Punjab, Lahore, Pakistan
[5] Leeds Inst Hlth Sci, Leeds, W Yorkshire, England