A comparison of low-dose heparin with low-molecular-weight heparin as prophylaxis against venous thromboembolism after major trauma. - Geerts,W.H.; Richard,M.J.; Code,K.I.; Chen,E.; Szalai,J.P.; Eric,A.; Saibil,M.D.; Hamilton,P.A. (N Engl J Med, 1996)