The effect of activated prothrombin-complex concentrate (FEIBA) on joint and muscle bleeding in patients with hemophilia A and antibodies to factor VIII - Sjamsoedin, L JM; Heijnen, L; Mauser-Bunschoten, E P; Van Geijlswijk , J L; Van Houwelingen, H; Van Asten, P; Sixma, J J (N Engl J Med, 1981)