Subcutaneous low-molecular-weight heparin or oral anticoagulants for the prevention of deep-vein thrombosis in elective hip and knee replacement? - Hamulyak, K; Lensing, AWA; van der Meer, J; Smid, WM; van Ooy, A; Hoek, JA; for the Fraxiparine Oral Anticoagulant Study Group. (Thromb Haemostas, 1995)