Posted as supplied by author.

w1 Stem Cell Research: Hope or Hype? www.savingfaces.co.uk (accessed 13 May 2005)

w2 1987 (A v National Blood Authority, [2001] TNLR No 200 (QB Div) (QL) (Burton J)

w3 BSE Inquiry Report 2000. www.bseinquiry.gov.uk

w4 Standardisation of Organ Donor Screening to Prevent Transmission of Neoplastic Diseases -– Council of Europe - December 1997 ISBN 92-871-3485-5

w5 Sanzen L, Carlsson A. Transmission of human T-cell lymphotrophic virus type 1 by a deep-frozen bone allograft. Acta Orthop Scand 1997;68(1):72-4.

w6 Simonds RJ, Holmberg SD, Hurwitz RL, Coleman TR, Bottenfield S, Conley LJ, et al. Transmission of human immunodeficiency virus type 1 from a seronegative organ and tissue donor. N Engl J Med 1992;326(11):726-32.