Anal intercourse risk of HBV in women.
D000163:Acquired Immunodeficiency Syndrome / Q000635:transmission; D001003:Anal Canal; D005260:Female; D006679:HIV Seropositivity; D015497:HIV-1; D006509:Hepatitis B / Q000453:epidemiology / Q000635:transmission*; D006801:Humans; D008297:Male; D010413:Penis; D015995:Prevalence; D012725:Sexual Behavior; D006113:United Kingdom / Q000453:epidemiology