[1] Division of STD Prevention, Natl. Ctr. HIV, STD, and TB Prev., Centers for Dis. Contr. and Prev., Atlanta, GA
[2] Division of HIV Prevention, Natl. Ctr. HIV, STD, and TB Prev., Centers for Dis. Contr. and Prev., Atlanta, GA
[3] School of Hygiene and Public Health, Johns Hopkins University, Baltimore, MD
[4] School of Public Health, Columbia University, New York, NY
[5] Ctr. for Hlth. Educ. and Research, University of Washington, Seattle, WA
[6] Department of Psychology, Georgia State University, Atlanta, GA
[7] Centers for Dis. Contr. and Prev., Atlanta, GA 30333, 1600 Clifton Rd.