Letter from Professor A. L. Bloom to Dr D. Walford ccd Dr K. Fowler and Dr. C. R. Rizza. Haemophilia Directors considering if factor VIII concentrate imported from USA are up to the standards recommended for use in USA. Considers the possibility of US manufacturers choosing to export plasma collected before the revised FDA guidelines were circulated. Mentions Haemophilia Centres request for imported Factor VIII to be at least up to the standards recommended for use in the USA. Dr Watford to liaise with Medicines Division.