Production in Escherichia coli of a biologically active subfragment of von Willebrand factor corresponding to the platelet glycoprotein Ib, collagen and heparin domains - Pietu, G; Muellen, P; Cherel, G; Diaz, J; Baruch, D; Cortney, M; Meyer, D (Biochem Biophys Res Comm, 1989)