[1] London Sch Hyg & Trop Med, Fac Publ Hlth & Policy, Dept Global Hlth & Dev, London WC1H 9SH, England
[2] Sexual Violence Res Initiat, Pretoria, South Africa
[3] Ludwig Maximilians Univ Munchen, Inst Med Informat Proc Biometry & Epidemiol, Med Fac, Munich, Germany
[4] UNICEF Innocenti Global Off Res & Foresight, Florence, Italy