title: A multifactorial model for the development of AIDS in homosexual men.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology* / Q000276:immunology / Q000382:microbiology; D000917:Antibody Formation; D003586:Cytomegalovirus Infections / Q000150:complications* / Q000276:immunology; D004777:Environment; D006716:Homosexuality; D006801:Humans; D008297:Male; D012306:Risk; D012661:Semen; D013602:T-Lymphocytes, Cytotoxic / Q000382:microbiology