Ukwaja Kingsley N, Onyedum Cajetan C
Department of Internal Medicine, Federal Teaching Hospital, PMB 102 Abakaliki, Nigeria.
Department of Medicine, College of Medicine, University of Nigeria Teaching Hospital, Enugu, Nigeria.
Lancet. 2014 Jan 18;383(9913):214. doi: 10.1016/S0140-6736(14)60066-0.