A comparison of Low Molecular Weight Heparin with Unfractionated Heparin for Acute Pulmonary Embolism - Simonneau, G; Sors, H; Charbnnier, B; Page, Y; Laaban, JP; Azarian, R; Laurent, M; Hirsch, JL; Ferrari, E; Bosson, JL; Mottier, D; Beau, B (N E J Med, 1997)