Tuberculin sensitivity in elderly patients.
D000368:Aged; D004938:Esophageal Neoplasms / Q000532:radiotherapy; D005188:False Negative Reactions; D006801:Humans; D011830:Radiation Effects; D011859:Radiography; D013950:Thymus Gland / Q000528:radiation effects; D014374:Tuberculin Test; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis* / Q000000981:diagnostic imaging