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