A comparison of low molecular weight heparin with unfractionated heparin for acute pulmonary embolism - Simmoneau, G; Sors, H; Charbonnier, B; Page, Y; Laaban, JP; Azarian, R; Laurent, M; Hirsch, JL; Ferrari, E; Bosson, JL; Mottier, D; Beau, B; for the Thésée Study Group. (N Engl J Med, 1997)