Dr.MJ Godman FRCP , Chief of Paediatric Cardiology, King Fahad National Guard Hospital, Riyadh 11426, PO Box 22490, KSA. Tel 009661 2520088 ext 6771 Fax 009661 2520211

Prof. Z.A. Karrar FRCP , Faculty of Medicine ,University of Khartoum P.O Box 103, Khartoum , Sudan

Prof.M.A.Abdulla FRCP ,Consultant Paediatric Endocrinologist University of Khartoum, Faculty of Medicine PO Box 102, Sudan