Hull RD, Raskob GE, Rosenbloom D, Pineo GF, Lerner RG, Gafni A, Trowbridge AA, Elliott CG, Green D, Feinglass J. Treatment of proximal vein thrombosis with subcutaneous low-molecular-weight heparin vs intravenous heparin. An economic perspective. Arch Intern Med. 1997 Feb 10; 157(3):289-94.