[1] Ghana Hlth Serv, Navrongo Hlth Res Ctr, POB 114, Navrongo, Ghana
[2] Ghana Hlth Serv, Navrongo War Mem Hosp, Navrongo, Ghana
[3] Univ Utrecht, Univ Med Ctr Utrecht, Julius Ctr Hlth Sci & Primary Care, Julius Global Hlth, Utrecht, Netherlands
[4] Univ Ghana, Reg Inst Populat Studies, Legon, Accra, Ghana
[5] Swiss Trop & Publ Hlth Inst, Basel, Switzerland
[6] Univ Basel, Basel, Switzerland
[7] Univ Nairobi, Dept Obstet & Gynecol, Nairobi, Kenya
[8] Univ Witwatersrand, Fac Hlth Sci, Sch Publ Hlth, Dept Epidemiol & Biostat, Johannesburg, South Africa
[9] Ghana Hlth Serv PMB, Upper East Reg Hlth Directorate, Bolgatanga, Ghana
[10] Ghana Hlth Serv, Policy Planning Monitoring & Evaluat Div, Accra, Ghana