[1] UCL, Inst Global Hlth, London, England
[2] CDC, Washington, DC USA
[3] Oxford Univ UCT, Oxford, England
[4] Imperial Coll, London, England
[5] WHO, Geneva, Switzerland
[6] Maestral, Washington, DC USA
[7] World Bank, 1818 H St NW, Washington, DC 20433 USA
[8] World Orphans, Washington, DC USA
[9] Univ KwaZulu Natal, Durban, South Africa
[10] Harvard, Boston, MA USA