<unk>  concentrated from donated blood plasma, or alternatively recombinant<unk>  can be given to hemophiliacs to restore hemostasis. Antibody formation to<unk>  can also be a major concern for patients receiving therapy against bleeding; the incidence of these inhibitors is dependent of various factors, including the<unk>  product itself.
Factor VIII
Factor IX
Factor XI
Thrombin
Prothrombinase
Von Willebrand factor
Fibrinogen
Platelet-activating factor