title: Anal sex.
authors.forename: P E
authors.initials: PE
authors.lastname: Asard
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology / Q000635:transmission*; D005260:Female; D006467:Hemophilia A / Q000150:complications; D006801:Humans; D008297:Male; D012725:Sexual Behavior