[1] Royal Marsden Hosp, GI Clin Trials Unit, Sutton, Surrey, England
[2] Antoni von Leeuwenhoek Hosp, Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands
[3] Antoni von Leeuwenhoek Hosp, Netherlands Canc Inst, Div Biol Stress Response, Amsterdam, Netherlands
[4] Royal Marsden Hosp, Dept Surg, London SW3 6JJ, England
[5] Royal Marsden Hosp, Dept Med, Sutton, Surrey, England
[6] Univ Valencia, INCLIVA, Dept Hematol & Med Oncol, Valencia, Spain
[7] Tumor Biol Ctr, Dept Med Oncol, Freiburg, Germany