1. Neuroendocrine Tumour Unit, ENETS Centre of Excellence, First Department of Propaedeutic and Internal Medicine, Laiko Hospital National and Kapodistrian University of Athens Athens Greece
2. Department of Surgery, Faculty of Medicine and Health Örebro University Örebro Sweden
3. Second Department of Surgery, "Korgialenio‐Benakio" Red Cross General Hospital Athens Greece
4. Unit of Endocrinology, First Department of Internal Medicine, Laiko Hospital National and Kapodistrian University of Athens Athens Greece
5. Neuroendocrine Tumour Unit, ENETS Centre of Excellence King's College Hospital London UK
6. The ARDEN NET Centre, ENETS Centre of Excellence University Hospitals Coventry and Warwickshire NHS Trust Coventry UK
7. Department of Endocrinology and Neuroendocrine Tumours, Department of Pathophysiology and Endocrinology Medical University of Silesia Katowice Poland
8. Neuroendocrine Unit, ENETS Centre of Excellence, Department of Endocrinology and Metabolism, Hadassah Medical Centre and Faculty of Medicine The Hebrew University Jerusalem Israel