A phase II study of hirulog in the prevention of venous thrombosis after major hip or knee surgery. - Ginsberg, JS; Hirsh, J; Gent, M; McKinnon, B; Turpie, AGG; Levine, M; Powers, P; Weitz, J; Findlen, K; Neemeh, J; Buller, H; Adelman, B; Maraganore, J; Fox, I (Circulation, 1992)