1. Prevention of deep vein thrombosis after hip replacement: randomised comparison between unfractionated heparin and low molecular weight heparin. Issue 6802 (7th September 1991) Authors: Leyvraz, P F; Bachmann, F; Hoek, J; Büller, H R; Postel, M; Samama, M; Vandenbroek, M D Journal: BMJ Issue: Volume 303:Issue 6802(1991) Page Start: 543 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗