1. Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa (L.F.G.-M., R.K., W.S., C.M.C.M., J.M.V.R., G.G.M., A.S.U., S.J.B., A.E.S.).
2. South African Medical Research Council: Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa (L.F.G.-M., R.K., W.S., C.M.C.M., J.M.V.R., G.G.M., A.S.U., S.J.B., A.E.S.).
3. School of Population Health, University of New South Wales; Sydney, Australia (A.E.S.).
4. The George Institute for Global Health, Sydney, Australia (A.E.S.).