[1] Swiss Trop & Publ Hlth Inst, Basel, Switzerland
[2] Univ Basel, Basel, Switzerland
[3] McMaster Univ, Ctr Hlth Econ & Policy Anal, Dept Clin Epidemiol & Biostat, Hamilton, ON, Canada
[4] McMaster Univ, Dept Polit Sci, Hamilton, ON, Canada
[5] Norwegian Knowledge Ctr Hlth Serv, Oslo, Norway
[6] Med Res Council S Africa, Hlth Syst Res Unit, Cape Town, South Africa
[7] Global Fund Fight AIDS TB & Malaria, Geneva, Switzerland
[8] Harvard Univ, Kennedy Sch, Cambridge, MA 02138 USA
[9] Ctr Rosarino Estudios Perinatales, Rosario, Argentina
[10] Amer Univ Beirut, Dept Hlth Policy & Management, Beirut, Lebanon
[11] Univ Cape Town, Sch Publ Hlth, ZA-7700 Rondebosch, South Africa
[12] London Sch Hyg & Trop Med, Dept Global Hlth & Dev, London WC1, England
[13] Univ London, Inst Educ, EPPI Ctr, Social Sci Res Unit, London WC1N 1AZ, England
[14] Univ Ottawa, Ctr Global Hlth, Inst Populat Hlth, Ottawa, ON, Canada
[15] World Hlth Org, Innovat Informat Evidence & Res, Geneva, Switzerland
[16] London Sch Hyg & Trop Med, Dept Social & Environm Hlth Res, London WC1, England
[17] London Sch Hyg & Trop Med, Dept Nutr & Publ Hlth Res, London WC1, England