1. From the Department of Medicine, Faculty of Clinical Sciences, University of Abuja, and University of Abuja Teaching Hospital (D.B.O.), and the Departments of Family Medicine (G.L.S.) and Pharmacy (G.S.), University of Abuja Teaching Hospital, Gwagwalada, Abuja, the Cardiology Unit, Department of Medicine, University College Hospital, Ibadan (O.O.), and the Department of Medicine, Bayero University, and Aminu Kano Teaching Hospital, Kano (M.U.S.) — all in Nigeria; the Department of Medicine (B.M.), the...