The broad spectrum of unstable angina pectoris and its implications for future controlled trials.
D000787:Angina Pectoris / Q000145:classification*; D000789:Angina, Unstable / Q000145:classification* / Q000188:drug therapy / Q000503:physiopathology; D002986:Clinical Trials as Topic; D004562:Electrocardiography; D006801:Humans