title: Case definitions for AIDS--Europe and the United States part company.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000145:classification / Q000453:epidemiology*; D002487:Centers for Disease Control and Prevention, U.S.; D005060:Europe / Q000453:epidemiology; D006801:Humans; D014481:United States / Q000453:epidemiology