title: Acquired immune deficiency disease after three years. The unsolved riddle.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology / Q000276:immunology / Q000382:microbiology; D000818:Animals; D003587:Cytomegalovirus; D017977:Deltaretrovirus; D004195:Disease Models, Animal; D006515:Hepatitis B virus; D004854:Herpesvirus 4, Human; D006716:Homosexuality; D006801:Humans; D008253:Macaca mulatta; D008297:Male; D011020:Pneumonia, Pneumocystis / Q000209:etiology; D012192:Retroviridae Infections / Q000209:etiology; D013601:T-Lymphocytes / Q000276:immunology