Infectious complications in the elderly COPD patient.
D000368:Aged; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications*; D011014:Pneumonia / Q000188:drug therapy / Q000209:etiology / Q000382:microbiology / Q000517:prevention & control; D012141:Respiratory Tract Infections / Q000209:etiology*; D014397:Tuberculosis, Pulmonary / Q000209:etiology