[1] Univ N Carolina, Inst Global Hlth & Infect Dis, Sch Med, Chapel Hill, NC 27515 USA
[2] London Sch Hyg & Trop Med, Fac Infect & Trop Dis, Clin Res Dept, London, England
[3] Yale Univ, Sect Infect Dis, Dept Internal Med, New Haven, CT USA
[4] Univ Malaya, Fac Med, Infect Dis Unit, Kuala Lumpur, Malaysia
[5] Armauer Hansen Res Inst, Viral Dis Res Team, Addis Ababa, Ethiopia
[6] Ctr Infect Dis Res Zambia, TB Programs Div, Lusaka, Zambia
[7] Malaysian Minist Hlth, Internal Med Serv, Kuala Lumpur, Malaysia
[8] Hosp Sultanah Bahiyah, Clin Res Dept, Alor Setar, Kedah, Malaysia