Ford Chandra L, Konrad Thomas R, Godette Dionne C, Corbie-Smith Giselle
Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.
Sex Transm Dis. 2008 Mar;35(3):211-3. doi: 10.1097/olq.0b013e31814b855f.