Subcutaneous low molecular weight heparin compared with continuous intravenous heparin in the treatment of proximal vein thrombosis - Hull, R D; Raskob, M B; Pineo, G F; Green, D; Trownbridge, A A; Elliot, G; Lemer, R G; Hall, J; Sparling, T; Bretelli, H R; Norton, J; Carter, C J; George, R; Merli, G; Ward, J; Mayo, W; Rosenbloom, D; Brant, R (N Eng J Med, 1992)