Efficacy and safety of the factor VIII/von Willebrand factor concentrate, haemate-P/humate-P: ristocetin cofactor unit dosing in patients with von Willebrand disease - Lillicrap, D; Poon, M-C; Walker, I; Xie, F; Schwartz, B A; Association of Hemophilia Clinic Directors of Canada (Thromb Haemost, 2002)