[1] Christie Hosp NHS Fdn Trust, Manchester, Lancs, England
[2] Royal Marsden Hosp, Breast Unit, London SW3 6JJ, England
[3] St Marys Hosp, Manchester M13 0JH, Lancs, England
[4] Inst Canc Res, Breakthrough Breast Canc Res Ctr, London SW3 6JB, England
[5] Royal Marsden NHS Trust, Dept Acad Biochem, London, England