[1] Univ Kinshasa, Clin Univ Kinshasa, Dept Gynecol & Obstet, Kinshasa, DEM REP CONGO
[2] Univ Edinburgh, Usher Inst, Ctr Global Hlth, Edinburgh, Midlothian, Scotland
[3] Univ Nairobi, Dept Obstet & Gynecol, Fac Hlth Sci, Nairobi, Kenya
[4] WHO, Dept Sexual & Reprod Hlth & Res, Dev & Res Training Human Reprod HRP, World Bank Special Programme Res,UNDP,UNFPA,UNICE, Geneva, Switzerland
[5] London Sch Hyg & Trop Med, Dept Infect Dis Epidemiol, London, England