Preoperative use of enoxaparin compared with unfractionated heparin increases the incidence of re-exploration for postoperative bleeding after open-heart surgery in patients who present with an acute coronary syndrome: clinical investigation and reports. - Jones,H.U.; Muhlestein,J.B.; Jones,K.W.; Bair,T.L.; Lavasani,F.; Sohrevardi,M.; Horne,B.D.; Doty,D.; Lappe,D.L. (Circulation, 2002)