title: T lymphocyte assessment in vivo.
mesh_terms: D000941:Antigens / Q000276:immunology; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000276:immunology; D012882:Skin Tests / Q000379:methods*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000941:Antigens