The thymus in immune deficiency.
D000818:Animals; D006801:Humans; D007111:Immunity, Cellular; D007153:Immunologic Deficiency Syndromes / Q000276:immunology / Q000473:pathology* / Q000601:surgery; D013934:Thymectomy; D013950:Thymus Gland / Q000276:immunology / Q000473:pathology* / Q000637:transplantation