[1] Univ London London Sch Hyg & Trop Med, Directors Off, London WC1E 7HT, England
[2] Univ Western Cape, Sch Publ Hlth, ZA-7535 Bellville, South Africa
[3] Ctr Dis Control & Prevent, Malaria Branch, Natl Ctr Infect Dis, Atlanta, GA USA
[4] MRC, Saving Newborn Lives Save Childrens US, Cape Town, South Africa
[5] MRC, Hlth Syst Res Unit, Cape Town, South Africa
[6] Univ London London Sch Hyg & Trop Med, Dept Publ Hlth & Policy, London WC1E 7HT, England
[7] George Inst Int Hlth, Sydney, NSW, Australia
[8] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD 21218 USA
[9] Aga Khan Univ, Dept Pediat & Child Hlth, Karachi, Pakistan