[1] Mahidol Univ, Ramathibodi Hosp, Fac Med, Bangkok 10400, Thailand
[2] Chulalongkorn Univ, HIV NAT Thai Red Cross AIDS Res Ctr, Bangkok 10330, Thailand
[3] Chulalongkorn Univ, Fac Med, Bangkok 10330, Thailand
[4] TREAT Asia, Fdn AIDS Res, Bangkok, Thailand
[5] Res Inst Hlth Sci, Chiang Mai, Thailand
[6] Chiang Rai Reg Hosp, Chiang Rai, Thailand
[7] Univ New S Wales, Natl Ctr HIV Epidemiol & Clin Res, Sydney, NSW, Australia
[8] Queen Elizabeth Hosp, Hong Kong, Hong Kong, Peoples R China
[9] Hosp Sungai Buloh, Sungai Buloh, Malaysia
[10] Univ Malaya, Kuala Lumpur, Malaysia