From the *Department of Immunology and Infectious Diseases; †Harvard School of Public Health AIDS Initiative; ‡Department of Epidemiology; §Interdisciplinary Program in Infectious Disease Epidemiology; ‖Program on International Health and Human Rights; and ¶Department of Population and International Health, Harvard School of Public Health, Boston, MA.
Received for publication April 3, 2008; accepted August 13, 2008.
P.C. was supported by an Oak Foundation Fellowship through the Harvard School of Public Health AIDS Initiative.
The authors declare that they have no conflict of interest.
Correspondence to: M. Essex, DVM, PhD, Chair, Harvard School of Public Health AIDS Initiative, Harvard School of Public Health, FXB 402, 651 Huntington Avenue, Boston, MA 02115 (e-mail:[email protected]).