[1] Radcliffe Infirm, Canc Res UK Epidemiol Unit, Oxford OX2 6HE, England
[2] Princess Wales Community Hosp, Breast Screening Serv, Bromsgrove B61 0BB, England
[3] Charing Cross Hosp, W London Breast Screening Serv, London W6 8RF, England
[4] Gloucestershire Breast Screening Serv, Cheltenham GL53 7AS, Glos, England
[5] Churchill Hosp, Oxford Radcliffe Hosp NHS Trust, Breast Care Unit, Oxford OX3 7JH, England
[6] Queen Alexandra Hosp, Patricia Massey Breast Screening Unit, Portsmouth PO6 3LY, Hants, England
[7] Cent Hlth Clin, Avon Breast Screening, Bristol BS2 0JD, Avon, England
[8] Royal Lancaster Infirm, N Lancashire Breast Screening Serv, Lancaster LA1 4GG, England
[9] Worthing Dist Hosp, W Sussex Breast Screening Serv, Worthing BN11 2DH, England
[10] Coventry & Warwick Hosp, Breast Screening Unit, Coventry CV1 4FH, W Midlands, England
[11] Nightingale Ctr, Greater Manchester Breast Screening Serv, Manchester M20 0PT, Lancs, England
[12] NHS Breast Screening Programme, Sheffield S11 9PS, S Yorkshire, England