Von Willebrand factor without the A2 domain is resistant to proteolysis - Lankhof, H; Damas, C; Schiphorst, ME; Ijsseldijk, MJW; Bracke, M; Furlan, M; Tsai, HM; De Groot, PG; Sixma, JJ; Vink, T (Thromb Haemost, 1997)