From the Centers for Disease Control. Hepatitis A among homosexual men--United States, Canada, and Australia.
D000328:Adult; D001315:Australia / Q000453:epidemiology; D002170:Canada / Q000453:epidemiology; D006506:Hepatitis A / Q000453:epidemiology*; D006716:Homosexuality / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D014481:United States / Q000453:epidemiology; D014505:Urban Population