[The aging immune system: primary or secondary changes in immunity in the elderly].
Wick
G
G
D000368:Aged; D000375:Aging / Q000276:immunology*; D017951:Antigen Presentation / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D006801:Humans; D007108:Immune Tolerance / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology