1 Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
2 Department of Medical Oncology, Hospital Universitario de Navarra (HUN), Pamplona; Gastrointestinal Tumours Group, Vall d'Hebron Institute of Oncology, Barcelona.
3 Department of Medical Oncology, INCLIVA Biomedical Research Institute, University of Valencia, Valencia; CIBERONC, Instituto de Salud Carlos III, Madrid, Spain.
4 The Sir Peter MacCallum Department of Oncology, Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Australia.
5 Department of Medicine II (Oncology, Gastroenterology, Hepatology, Pulmonology and Infectious Diseases), University Cancer Center Leipzig (UCCL), Leipzig University Medical Center, Leipzig, Germany.
6 Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm; Department of Upper Abdominal Diseases, Karolinska University Hospital, Stockholm, Sweden.
7 Department of Pathology, Amsterdam University Medical Centers, Cancer Center Amsterdam, Vrije Universiteit, Amsterdam, The Netherlands.
8 Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany.
9 Department of Oncology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.