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 JL; Van, Houwelingen H; Van, Asten P; Sixma, J J (N Engl J Med, 1981)