to determine the exposure to hepatitis a and hepatitis b viruses ( hav , hbv ) following intravenous replacement therapy in patients with classic hemophilia and to assess the role of these viruses in persistently elevated aminotransferases , sera were studied from 136 patients from 9 months to 67 years of age were transfused with either single-donor cryoprecipitate ( cryo ) or antihemophilic factor concentrate ( ahf ) for periods ranging from a few months to 15 years .
C0019069
classic hemophilia
C0015506
ahf