[1] Imperial Coll London, London, England
[2] Ludwig Maximilians Univ Munchen, Munich, Germany
[3] Univ Hosp Duesseldorf, Dusseldorf, Germany
[4] Imperial Coll London, Dept Epidemiol & Biostat, London, England
[5] Johns Hopkins Univ, Dept Epidemiol, Baltimore, MD USA
[6] Yale Univ, New Haven, CT USA
[7] Vet Affairs Connecticut Healthcare Syst, New Haven, CT USA
[8] Univ Amsterdam, Amsterdam Univ Med Ctr, Amsterdam, Netherlands
[9] Amsterdam Inst Global Hlth & Dev, Amsterdam, Netherlands
[10] HIV Monitoring Fdn, Amsterdam, Netherlands
[11] Biomed Res & Training Inst, Harare, Zimbabwe
[12] Univ Hosp Geneva, Infect Dis Unit, Geneva, Switzerland