[1] UMass Chan Med Sch, Dept Populat & Quantitat Hlth Sci, Worcester, MA USA
[2] Yale Sch Med, Dept Internal Med, Sect Infect Dis, New Haven, CT 06510 USA
[3] Univ Connecticut, Dept Allied Hlth Sci, Storrs, CT 06269 USA
[4] Emory Univ, Rollins Sch Publ Hlth, Atlanta, GA USA
[5] Univ Malaya, Fac Med, Ctr Excellence Res AIDS CERiA, Kuala Lumpur, Malaysia
[6] Univ Malaya, Fac Med, Dept Med, Infect Dis Unit, Kuala Lumpur, Malaysia