title: Seroepidemiology of hepatitis B infection in a male homosexual population.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology; D000328:Adult; D006509:Hepatitis B / Q000453:epidemiology*; D006511:Hepatitis B Antigens / Q000032:analysis*; D006716:Homosexuality; D006801:Humans; D008297:Male; D012306:Risk
chemical_list: D006511:Hepatitis B Antigens