CHOW, WONG-HO; DALING, JANET R.; CATES, WILLARD; GREENBERG, RAYMOND S.; CHOW WONG-HO; Georgia Center for Cancer Statistics, Department of Community Health, Emory University School of Medicine; Division of Sexually Transmitted Diseases, Centers for Disease Control; DALING JANET R.; Department of Epidemiology, University of Washington School of Public Health and Community Medicine; CATES WILLARD; Division of Sexually Transmitted Diseases, Centers for Disease Control; GREENBERG RAYMOND S.; Georgia Center for Cancer Statistics, Department of Community Health, Emory University School of Medicine