1. From Chronic Disease Research Centre/Tropical Medicine Research Institute and School of Clinical Medicine and Research (D.O.C.C., V.P., A.H., A.G., C.R., H.S.F.), University of the West Indies, Barbados; Epidemiology Research Unit (R.W.), Tropical Medicine Research Institute, University of the West Indies, Mona, Jamaica; and Department of Public Health Sciences (C.D.A.W.), Guy’s, King’s, and St Thomas’ Hospital School of Medicine, London, UK.