[1] Xi An Jiao Tong Univ, Dept Infect Dis, Affiliated Hosp 2, Xian, Shaanxi, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Publ Hlth, Hlth Sci Ctr, Xian, Shaanxi, Peoples R China
[3] Univ Ghent, Fac Med & Hlth Sci, Int Ctr Reprod Hlth, Ghent, Belgium
[4] Natl Univ Singapore Hosp, Dept Obstet & Gynaecol, Singapore, Singapore
[5] Minist Hlth Malaysia, Inst Publ Hlth, Putrajaya, Malaysia
[6] Xi An Jiao Tong Univ, Sch Publ Policy & Adm, Xian, Shaanxi, Peoples R China
[7] Natl Res Inst Family Planning, Social Med Ctr, Beijing, Peoples R China
[8] Univ Munich, Div Infect Dis & Trop Med, Munich, Germany
[9] German Ctr Infect Res, Partner Site Munich, Munich, Germany
[10] Karolinska Inst, Dept Global Publ Hlth, Stockholm, Sweden
[11] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[12] Fdn Profess Dev, Hlth Syst Strengthening, Pretoria, South Africa
[13] London Sch Hyg & Trop Med, Dept Clin Res, London, England
[14] Univ North Carolina Chapel Hill, Sch Med, Chapel Hill, NC USA
[15] Univ Libre Bruxelles, Sch Publ Hlth, Brussels, Belgium
[16] Univ Ghent, Int Ctr Reprod Hlth, B-9000 Ghent, Belgium