[1] Consejo Nacl Invest Cient & Tecn, IECS, RA-2024 Buenos Aires, DF, Argentina
[2] Univ Cape Town, Fac Hlth Sci, Dept Human Biol, Div Human Nutr, Cape Town, South Africa
[3] WHO, Dept Reprod Hlth & Res, HRP UNDP UNFPA UNICEF WHO World Bank Special Prog, Geneva, Switzerland
[4] WHO, WHO Reg Off Europe, Copenhagen, Denmark
[5] Univ Witwatersrand, Effect Care Res Unit, Johannesburg, South Africa
[6] Walter Sisulu Univ, Eastern Cape Dept Hlth, Effect Care Res Unit, Mthatha, South Africa
[7] Univ Ft Hare, Effect Care Res Unit, East London, England
[8] Stellenbosch Univ, Dept Obstet & Gynaecol, Cape Town, South Africa
[9] Tygerbergc Hosp, Cape Town, South Africa
[10] Inst Nacl Higiene, Epidemiol & Microbiol La Habana, Havana, Cuba
[11] Univ Pittsburgh, Dept Obstet & Gynecol, Magee Womens Res Inst, Pittsburgh, PA USA