1. Fleming WL. Syphilis through the ages.Med Clin North Am. 1964;48:587.
2. Centers for Disease Control. Syphilis—United States, 1983.MMWR Morb Mortal Wkly Rep. 1984;33:433.
3. Centers for Disease Control. Syphilis and congenital syphilis—United States, 1985–1988.MMWR Morb Mortal Wkly Rep. 1988;37:486–489.
4. Centers for Disease Control. Regional and temporal trends in the surveillance of syphilis, United States, 1986–1990. In Webster LS, Rolfs RT, Nakashima AK, Greenspan JR. CDC surveillance summaries.MMWR. December 1991;40:29.
5. Siegal HA, Carlson RG, Falck R,et al. High-risk behaviors for transmission of syphilis and human immunodeficiency virus among crack cocaine-using women.Sex Trans Dis. 1992;19:266–271.