HEPARIN IN THE PRESENCE OR ABSENCE OF ANTIPLATELET THERAPY - AN OVERVIEW OF RANDOMIZED TRIALS IN ACUTE MYOCARDIAL-INFARCTION - Macmahon, S; Collins, R; Flather, M; Knight, C; Remvig, L; Mortensen, S; Godwin, J; Yusuf, S; Peto, R (CIRCULATION, 1992)