[1] Katutura State Hosp, Dept Obstet & Gynaecol, POB 86237, Windhoek, Namibia
[2] Haydom Lutheran Hosp, Dept Obstet & Gynaecol, Haydom, Tanzania
[3] Southmead Hosp, Dept Obstet & Gynaecol, Bristol, Avon, England
[4] Muhimbili Natl Hosp, Dept Obstet, Dar Es Salaam, Tanzania
[5] Leiden Univ, Med Ctr, Dept Obstet, Leiden, Netherlands
[6] Vrije Univ Amsterdam, Athena Inst, Amsterdam, Netherlands
[7] Med Ctr Leeuwarden, Dept Obstet & Gynaecol, Leeuwarden, Netherlands
[8] Univ Groningen, Univ Med Ctr Groningen, Dept Hlth Sci, Global Hlth, Groningen, Netherlands