β3 integrin derived peptide 217-230 inhibits fibrinogen binding and platelet aggregation: significance of RGD sequences and fibrinogen A-chain. - Lasz, EC; McLane, MA; Trybulec, M; Kowalska, MA; Khan, S; Budzynski, AZ; Niewiarowski, S (Biochem Biophys Res Commun, 1993)