[1] World Bank, 1776 G St NW, Washington, DC 20006 USA
[2] Ctr Global Child Hlth, Toronto, ON, Canada
[3] World Hlth Org, Dept Immunizat Vaccines & Biol, Geneva, Switzerland
[4] London Sch Hyg & Trop Med, Epidemiol & Int Hlth, London, England
[5] Gavi, Geneva, Switzerland
[6] Minist Hlth, Int Inst Primary Hlth Care, Addis Ababa, Ethiopia
[7] Bill & Melinda Gates Fdn, Seattle, WA USA
[8] Minist Hlth Community Dev Gender Elderly & Childr, Dodoma, Tanzania
[9] United Nations Childrens Fund, Hlth Sect, New York, NY USA
[10] Chemin Capite 6, CH-1295 Tannay, Switzerland
[11] Univ Witwatersrand, Reprod Hlth & HIV Inst, Johannesburg, South Africa
[12] Kepala Sawit E-23, Cinere 16514, Indonesia
[13] Univ Liverpool Liverpool Sch Trop Med, Dept Int Publ Hlth, Liverpool, Merseyside, England
[14] Univ Fed Pelotas, Int Ctr Equ Hlth, Pelotas, RS, Brazil