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, F P; Van Geijlswijk, J C; Van Houwelinger, H; Austen, P; Sixma, J (N Engl J Med, 1981)