Distinct abnormalities in the interaction of purified type IIA and IIB von Willebrand factor with the two platelet binding sites, glycoprotien complex Ib-IX and IIb-IIIa - De Marco, L; Mazzuccato, M; De Roia, D; Casonato, A; Federici, A B; Girolami, A; Ruggeri, Z M (J Clin Invest, 1990)