[1] Univ Ghana, Noguchi Mem Inst Med Res, POB 581, Accra, Ghana
[2] Univ Sydney, Sch Publ Hlth, Sydney, NSW, Australia
[3] UCL, Inst Adv Studies, London, England
[4] Eduardo Mondlane Univ, Fac Med, Maputo, Mozambique
[5] South African Med Res Council, Noncommunicable Dis Res Unit, Cape Town, South Africa
[6] Kwame Nkrumah Univ Sci & Technol, Kumasi, Ghana
[7] 37 Mil Hosp, Dept Med, Accra, Ghana
[8] Univ Canberra, Fac Hlth, Canberra, ACT, Australia
[9] Komfo Anokye Teaching Hosp, Dept Med, Kumasi, Ghana