[1] Alfred Hlth, Melbourne Sexual Hlth Ctr, Carlton, Vic, Australia
[2] Monash Univ, Cent Clin Sch, Melbourne, Vic, Australia
[3] Univ N Carolina, Dept Hlth Behav, Chapel Hill, NC USA
[4] Duke Univ, Sch Med, Dept Family Med & Community Hlth, Durham, NC USA
[5] Univ Tokyo, Tokyo Coll, Tokyo, Japan
[6] Univ N Carolina, Hlth Sci Lib, Chapel Hill, NC USA
[7] Univ Ibadan, Coll Med, Fac Clin Sci, Med & Surg, Ibadan, Nigeria
[8] Univ Philippines Manila, Natl Inst Hlth, Manila, Philippines
[9] Fdn Advancement Clin Epidemiol Inc, Manila, Philippines
[10] Wake Forest Sch Med, Dept Implementat Sci, Winston Salem, NC USA
[11] Univ N Carolina, Inst Global Hlth & Infect Dis, Chapel Hill, NC USA
[12] London Sch Hyg & Trop Med, Clin Res Dept, London, England
[13] Univ Philippines Manila, Dept Clin Epidemiol, Manila, Philippines