[1] Univ Manchester, Breakthrough Breast Canc Res Unit, Sch Canc Enabling Sci & Technol,Christie NHS Fdn, Manchester Acad Hlth Sci Ctr,Paterson Inst Canc R, Manchester M20 4BX, Lancs, England
[2] Lund Univ, Ctr Mol Pathol, Dept Lab Med, Malmo Univ Hosp, SE-20502 Malmo, Sweden
[3] Queen Mary Univ London, Canc Res UK Ctr Epidemiol Math & Stat, Wolfson Inst Prevent Med, London EC1M 6BQ, England
[4] Inst Canc Res, Breakthrough Breast Canc Res Ctr, London SW3 6JB, England
[5] Royal Marsden Hosp, London SW3 6JJ, England
[6] Univ Gothenburg, Sahlgrenska Canc Ctr, S-40530 Gothenburg, Sweden