Minutes of The Regional Transfusion Directors Meeting. Discussed Included Report from the Joint Sub-Committee on Prevention of Haemolytic Disease of the newborn, single donor pack study group - Report from Dr Lane, Developments in the Management of the Central laboratories, Serum Quality Control, Common system for handling Frozen Blood, Blood Transfusion Computing Project report, Reports from Regional Group Chairmen, National Proficiency Testing in Blood Group Serology, Possible Hazards of Long-Term Plasmapheresis, Retention of used donor packs, hepatitis testing,