[1] Mt Vernon Ctr Canc Treatment, Dept Radiotherapy, London, England
[2] Maria Sklodowska Curie Mem Canc Ctr, Dept Gastrointestinal Canc, Warsaw, Poland
[3] Inst Oncol, Warsaw, Poland
[4] UPMC Univ Paris 06, Sorbonne Univ, Dept Surg, Paris, France
[5] Hop St Antoine, AP HP, Paris, France
[6] Imperial Coll, Dept Radiol, Sutton, Surrey, England
[7] Royal Marsden Hosp, Sutton, Surrey, England
[8] Goethe Univ Frankfurt, Dept Radiotherapy & Oncol, Frankfurt, Germany
[9] INCLIVA Univ Valencia, Dept Med Oncol, CIBERONC, Valencia, Spain
[10] ICO, Lisbon, Portugal
[11] ESMO Head Off, Via L Taddei 4, CH-6962 Viganello Lugano, Switzerland