D A Christie and E M Tansey (eds), Leukaemia, transcript of a Witness Seminar held on 15 May 2001, Wellcome Witnesses to Twentieth Century Medicine, vol. 15, London, Wellcome Trust Centre for the History of Medicine at UCL, 2003, pp. ix, 85, £10.00 (paperback 0-85484-087-7).D A Christie and E M Tansey (eds), Genetic testing, transcript of a Witness Seminar held on 13 July 2001, Wellcome Witnesses to Twentieth Century Medicine, vol. 17, London, Wellcome Trust Centre for the History of Medicine at UCL, 2003, pp. xix, 130, £10.00 (paperback 0-85484-094-X).D A Christie and E M Tansey (eds), Cystic fibrosis, transcript of a Witness Seminar held on 11 July 2002, Wellcome Witnesses to Twentieth Century Medicine, vol. 20, London, Wellcome Trust Cen