title: Toward a better classification system for HIV infection.
authors.forename: R R
authors.initials: RR
authors.lastname: Redfield
authors.forename: E C
authors.initials: EC
authors.lastname: Tramont
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000145:classification* / Q000175:diagnosis; D006801:Humans; D008722:Methods; D011379:Prognosis