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