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