[1] Dhulikhel Hosp Kathmandu Univ Hosp, Dept Publ Hlth & Community Programs, Res & Dev Div, Dhulikhel, Nepal
[2] Emory Univ, Atlanta, GA 30322 USA
[3] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, London, England
[4] Univ Edinburgh, Usher Inst Populat Hlth Sci & Informat, Edinburgh, Scotland
[5] Kathmandu Univ, Sch Med Sci, Dept Obstet & Gynecol, Kathmandu, Nepal
[6] Kathmandu Univ, Sch Med Sci, Dept Publ Hlth & Community Programs, Dhulikhel, Nepal
[7] Kathmandu Univ, Sch Med Sci, Dept Community Med, Dhulikhel, Nepal