A two-site, monoclonal antibody-based immunoassay for von Willebrand factor: demonstration that vWF function resides in a conformational epitope. Characterization of the unique mechanism mediating the shear-dependent binding of soluble von Willebrand factor to platelets - Chand, S; McCraw, A; Hutton, R; Tuddenham, EG; Goodall, AH (Thromb Haemost, 1986)