Paper by J. Craske entitled Haemophilia Centre Directors Hepatitis Working Party - Study of the Incidence of Chronic Sequelae of Factor VIII Associated B and non-B Hepatitis, with Protocol A (Transfusion Associated Jaundice in Haemophiliacs) and Hepatitis survey forms. Outlines pilot project studying patients at the Oxford Haemophilia Centre who were transfused with six infected batches of Hemofil in 1974-5.