Effect of the 1993 European AIDS case definition in the United Kingdom.
D017088:AIDS-Related Opportunistic Infections / Q000145:classification / Q000453:epidemiology*; D000163:Acquired Immunodeficiency Syndrome / Q000145:classification / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D006801:Humans; D015994:Incidence; D011159:Population Surveillance; D006113:United Kingdom / Q000453:epidemiology