[1] WHO, Dept Making Pregnancy Safer, CH-1211 Geneva 27, Switzerland
[2] Ctr Pesquisas Saude Reprod Campinas, Campinas, Brazil
[3] Hosp Nacl Itaugua, Dept Obstet & Gynaecol, Itaugua, Paraguay
[4] Hosp El Madania, Minist Sante Populat & Rech, Algiers, Algeria
[5] Univ Western Ontario, Fac Med & Dent, Dept Epidemiol & Biostat, London, ON, Canada
[6] Makerere Univ, Inst Publ Hlth, Ctr Qual Hlth Care, Kampala, Uganda
[7] CREP, Rosario, Argentina
[8] Univ Ibadan, Coll Med, Dept Obstet & Gynaecol, Ibadan, Nigeria
[9] EngenderHlth, New York, NY USA
[10] Clin Univ Kinshasa, Dept Gynecol & Obstet, Kinshasa, DEM REP CONGO
[11] Fdn Salud Ambiente & Desarrollo, Quito, Ecuador
[12] Univ Abdou Moumouni Dioffo, Fac Sci Sante, Niamey, Niger
[13] Karolinska Inst, S-10401 Stockholm, Sweden
[14] Univ Nacl Autonoma Nicaragua, Leon, Nicaragua
[15] Hosp Docente Ginecobstet Amer Arias, Havana, Cuba
[16] Inst Invest Nutr, Lima, Peru
[17] Univ Oxford, Oxford OX1 2JD, England