Effects of recombinant hirudin (r-hirudin, HBW 023) on coagulation and platelet activation in vivo. Comparison with unfractionated heparin and a low-molecular-weight heparin preparation (fragmin) - Eichinger, S; Wolzt, M; Schneider, M; Nieszpaur-Los, M; Heinrichs, H; Lech-ner, K; Eichler, HG; Kyrle, PA (Arterioscler Thromb Vasc Biol, 1995)