[1] Burnet Inst, Maternal Child & Adolescent Hlth Program, Melbourne, Vic 3004, Australia
[2] WHO, Dept Sexual & Reprod Hlth & Res, Dev & Res Training Human Reprod HRP, UNDP UNFPA UNICEF WHO World Bank Special Programme, Geneva, Switzerland
[3] Ctr Estudios Estado & Soc CEDES, Buenos Aires, Argentina
[4] Ctr Rosarino Estudios Perinatales CREP, Rosario, Argentina
[5] Univ Cent Lancashire, Sch Nursing & Midwifery, Preston, England
[6] London Sch Hyg & Trop Med, Dept Infect Dis Epidemiol, London, England
[7] Bayero Univ, Africa Ctr Excellence Populat Hlth & Policy, Kano, Nigeria
[8] S Nijalingappa Med Coll, Bagalkot, India
[9] HSK Hosp & Res Ctr, Bagalkot, India
[10] Univ Botswana, Dept Obstet & Gynaecol, Gaborone, Botswana
[11] Univ Witwatersrand, East London, South Africa
[12] Walter Sisulu Univ, East London, South Africa
[13] Prince Songkla Univ, Fac Med, Dept Epidemiol, Hat Yai, Thailand
[14] Prince Songkla Univ, Fac Med, Dept Obstet & Gynecol, Hat Yai, Thailand
[15] Univ Ibadan, Coll Med, Fac Clin Sci, Dept Obstet & Gynaecol, Ibadan, Nigeria
[16] Univ Ibadan, Inst Adv Med Res & Training, Coll Med, Ibadan, Nigeria
[17] Univ Nairobi, Dept Obstet & Gynaecol, Nairobi, Kenya
[18] Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Social Med, Sao Paulo, Brazil
[19] Croydon Univ Hosp, London, England
[20] Univ Birmingham, Inst Metab & Syst Res, Birmingham, England