title: CD4+ T-lymphocytopenia in the elderly.
authors.forename: E
authors.initials: E
authors.lastname: Calderón
authors.forename: B
authors.initials: B
authors.lastname: Sánchez
authors.forename: F J
authors.initials: FJ
authors.lastname: Medrano
authors.forename: P
authors.initials: P
authors.lastname: Stiefel
authors.forename: M
authors.initials: M
authors.lastname: Leal
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000276:immunology*; D006801:Humans; D009894:Opportunistic Infections / Q000276:immunology; D018344:T-Lymphocytopenia, Idiopathic CD4-Positive / Q000453:epidemiology* / Q000276:immunology*