[1] Karolinska Inst, Dept Oncol Pathol, KBC, Stockholm, Sweden
[2] Univ Hosp, KBC, Stockholm, Sweden
[3] Karolinska Hosp, Clin & Translat Res, S-10401 Stockholm, Sweden
[4] Univ Manchester, Manchester, Lancs, England
[5] Christie Med Oncol Breast Unit, Manchester, Lancs, England