Synonyms : F VIII-vWf, Factor VIIIR-Ag, Factor VIIIR-RCo, Plasma Factor VIII Complex, Ristocetin Cofactor, Ristocetin-Willebrand Factor, vWF Ag, von Willebrand Factor Type IIB, von Willebrand Protein, Ag, vWF, Antigen, Factor VIII-Related, Cofactor, Ristocetin, F VIII vWf