Clinical Study of the Biological Efficiency of a High-Purity FVIII:C/vWF Complex Concentrate in Non-bleeding Patients with von Willebrand Disease

This open-label prospective multicenter study was conducted to investigate the ex vivo biological effect of a high purity factor VIII:C/vWF complex concentrate, IMMUNATE STIM plus, manufactured by IMMUNO, Vienna, Austria [2]. The protocol used for the study was in conformity with the respective recommendations of the ISTH Scientific Subcommittee on von Willebrand Factor (vWF) studies [1].