All of the following factors are produced by hepatocytes except

Von Willebrand factor large-> 20,000 kD multimeric molecule composed of +- 200 kD monomers, synthesized by vascular endothelium, megakaryocytes, and platelets; vWFs hemostatic efficiency is related to multimer size.Ref: Ganong&;s review of medical physiology 23rd edition Page no: 532