Thrombin regulation of platelet interaction with damaged vessel wall and isolated collagen type I at arterial flow condition in porcine model: effects of hirudins, heparin, and calcium chelation - Badimon, L; Badimon, JJ; Lassila, R; Lassila, R; Heras, M; Chesebro, JH; Fuster, V. (Blood, 1991)