Letter from Dr M J Seaman at Addenbrookes Hospital Cambridge to Dr A Aronstam at Treloar Haemophilia Centre Lord Mayor Treloar College. The letter discusses [GRO-A] and states that [GRO-A] was HIV antibody negative in June 1985 and has since received only heat treated material from the beginning of 1985. He has only received factor VIII concentrate. The batch numbers are listed including; Elstree HLH 3242 3254B 3237B; 8Y 3292 3317; Heat treated; Cutter 55N007 50N014 55N009; Armour Y77404 Y96411 Y83006 A15501; Elstree 8Y3317 2228 3352 3385 3417