[1] Univ Calif San Francisco, Inst Global Hlth Sci, San Francisco, CA 94143 USA
[2] SUNY Buffalo, Dept Community Hlth & Hlth Behav, Buffalo, NY USA
[3] Navrongo Hlth Res Ctr, Navrongo, Ghana
[4] Univ Calif Berkeley, Berkeley, CA USA
[5] Univ Calif San Francisco, Dept Family Hlth Care Nursing, San Francisco, CA USA
[6] Tamale Teaching Hosp, Tamale, Ghana
[7] Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD USA
[8] Ghana Hlth Serv, Formerly Policy Planning Monitoring & Evaluat Div, Accra, Ghana
[9] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA USA