Guidelines for the diagnosis and treatment of neuroendocrine gastrointestinal tumours. A consensus statement on behalf of the European Neuroendocrine Tumour Society (ENETS).

a Department of Hepatology and Gastroenterology, Interdisciplinary Center for Metabolism, Endocrinology, and Diabetes, Charité-Universitätsmedizin Berlin, Berlin , Germany; b Department of Pathology, University of Parma, Parma , Italy; c Department of Gastroenterology, Philipps-Universität, Marburg , Germany; d Section for Endocrine Oncology, Department of Medical Sciences, University Hospital, Uppsala , Sweden; e Department of Nuclear Medicine, Erasmus University Medical Center, Rotterdam , The Netherlands; f Department of Internal Medicine, Erasmus University Medical Center, Rotterdam , The Netherlands; g Royal Free Hospital, London , UK; h Uppsala University, Department of Endocrine Oncology, Uppsala , Sweden; i University of Bern, Institute of Pathology, Bern , Switzerland; j Sahlgrenska sjukhuset, Department of Pathology, Gothenburg , Sweden; k Ospedale S. Andrea, Department of Gastroenterology, Rome , Italy; l Hôpital Beaujon, Department of Gastroenterology, Clichy , France, and Department of Surgery, Gothenburg University, Gothenburg, Sweden