A multicenter, double-blind, placebo-controlled trial of aprotinin for reducing blood loss and the requirement for donor-blood transfusion in patients undergoing repeat coronary artery bypass grafting - Levy, J H; Pifarre, R; Schaff, H V; Horrow, J C; Albus, R; Spiess, B; Rosengart, T K; Murray, J; Clark, R E; Smith, P; Nadel, A; Bonney, S L; Kleinfield, R (Circulation, 1995)