Pre-operative aspirin decreases platelet aggregation and increases post-operative blood loss: a prospective, randomised, placebo-controlled, double blind clinical trial in 100 patients with chronic stable angina. - Kallis,P.; Tooze,J.A.; Talbot,S.; Cowans,D.; Bevan,D.H.; Treasure,T. (Eur J Cardiothorac Surg, 1994)