factor viii procoagulant activity ( viii : c ) and factor viii-related antigen ( viiir : ag ) were normal , but both patients revealed an increased ristocetin-induced platelet aggregation and a qualitative abnormality of the factor viii protein , which was characterized by fast electrophoretic mobility of viiir : ag and an abnormal elution of factor viii-related activities on sepharose 2b .
C0042971
factor
C0542153
increased