title: CASS November 1983: two years later.
mesh_terms: D000787:Angina Pectoris / Q000175:diagnosis; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000188:drug therapy / Q000473:pathology / Q000601:surgery / Q000628:therapy*; D003331:Coronary Vessels / Q000473:pathology; D006801:Humans; D011379:Prognosis; D011897:Random Allocation; D012107:Research Design; D013997:Time Factors