[1] Boston Childrens Hosp, Div Gen Pediat, Dept Med, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Dept Pediat, Boston, MA 02115 USA
[3] ICON Clin Res, 456 Montgomery St,Suite 2200, San Francisco, CA 94104 USA
[4] Yale Univ, Sch Med, AIDS Program, Sect Infect Dis,Dept Internal Med, 135 Coll St,Suite 323, New Haven, CT 06510 USA
[5] Univ Malaya, CERiA, Kuala Lumpur, Malaysia
[6] Univ Malaya, Fac Med, Kuala Lumpur 59100, Malaysia
[7] Univ Malaya, Dept Diagnost & Integrated Dent Practice, Fac Dent, Kuala Lumpur 59100, Malaysia
[8] Yale Univ, Sch Publ Hlth, New Haven, CT USA
[9] Ctr Interdisciplinary Res AIDS, New Haven, CT USA