The problem of chronic disease.
D000375:Aging; D000755:Anemia, Sickle Cell / Q000175:diagnosis; D001168:Arthritis / Q000453:epidemiology; D002908:Chronic Disease; D003191:Comprehensive Health Care; D003365:Costs and Cost Analysis; D003933:Diagnosis; D004358:Drug Therapy; D006331:Heart Diseases / Q000453:epidemiology; D006801:Humans; D010607:Pharmacy Service, Hospital; D010820:Physicians; D012008:Recurrence; D013812:Therapeutics; D014481:United States