Underuse of aspirin for secondary prevention of vascular disease.
D001241:Aspirin / Q000627:therapeutic use*; D002318:Cardiovascular Diseases / Q000517:prevention & control*; D002561:Cerebrovascular Disorders / Q000517:prevention & control*; D017723:Drug Utilization Review; D006760:Hospitalization; D006801:Humans; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D011446:Prospective Studies