Fig. 1From: Administration of plasma-derived coagulation factor VIII during the perioperative period of mastectomy for breast cancer with acquired von Willebrand syndromeChange in VWF activity and APTT after test administration of FVIII/VWF concentrates. VWF activity is higher than the reference values at 1Â h post-administration VWF: von Willebrand factor, APTT: activated partial thromboplastin time,Back to article page