Randomized trial of low molecular weight heparin (dalteparin) in prevention of left ventricular thrombus formation and arterial embolism after acute anterior myocardial infarction: the Fragmin in Acute Myocardial Infarction (FRAMI) Study - Kontny,F.; Dale,J.; Abildgaard,U.; Pedersen,T.R. (J Am Coll Cardiol, 1997)