Relationship of syphilis to drug use and prostitution--Connecticut and Philadelphia, Pennsylvania.
D003237:Connecticut; D003376:Counseling; D005260:Female; D006716:Homosexuality; D006801:Humans; D008297:Male; D015143:Philadelphia; D011477:Sex Work; D019966:Substance-Related Disorders / Q000453:epidemiology*; D013587:Syphilis / Q000453:epidemiology* / Q000635:transmission; D014481:United States