[1] Univ Geneva, Inst Social & Prevent Med, Geneva, Switzerland
[2] Inst Super Tech Med, Kinshasa, DEM REP CONGO
[3] Appl Univ Hlth Sci La Source, Lausanne, Switzerland
[4] Wichita State Univ, Dept Publ Hlth Sci, Wichita, KS USA
[5] Univ Oxford, KEMRI Oxford Wellcome Trust Collaborat Programme, Oxford, England
[6] Warwick Med Sch, Div Hlth Sci, Coventry, W Midlands, England
[7] Univ Geneva, Unit Dev & Res Med Educ, Geneva, Switzerland