Protective effects of aspirin against acute myocardial infarction and death in men with unstable angina - Lewis, H D; Davis, J W; Archibald, D G; Steinke, W E; Smitherman, T C; Doherty, J E; Schnaper, H W; Le Winter, M M; Linares, E; Pouget, J M; Sabharwal, S C; Chesler, E; De Mots, H (N Engl J Med, 1983)