1 GI Clinical Trials Unit, Royal Marsden Hospital, Sutton, UK.
2 Department of Radiation Oncology and Division of Biological Stress Response, The Netherlands Cancer Institute, Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands.
3 Department of Surgery, Royal Marsden Hospital, London, UK.
4 Department of Medicine, Royal Marsden Hospital, Sutton, UK.
5 Department of Hematology and Medical Oncology, INCLIVA, University of Valencia, Spain.
6 Department of Medical Oncology, Tumor Biology Clinic, Albert Ludwigs University, Freiburg, Germany. Electronic address: clinicalguidelines@esmo.org.