1. Department of General, Visceral and Transplant SurgeryJohannes Gutenberg University Mainz Germany
2. Department of SurgeryUniversity Medical Center Utrecht Utrecht the Netherlands
3. Department of Visceral, Transplant, Thoracic and Vascular SurgeryUniversity Hospital of Leipzig Leipzig Germany
4. Department Hepatobiliary and Digestive SurgeryRennes University Hospital Rennes France
5. Department of PlasticReconstructive and Aesthetic Surgery, Rennes University Hospital Rennes France
6. Institute of Surgical GastroenterologyMadras Medical College Chennai India
7. Department of Thoracic Surgery IBeijing University Cancer Hospital Beijing China
8. Department of General, Visceral and Tumor SurgeryUniversity Hospital of Cologne Cologne Germany
9. Department of Digestive SurgeryUniversity Hospital of Bordeaux Bordeaux France
10. Combined Endoscopy UnitUniversity of Malaya Medical Center Kuala Lumpur Malaysia
11. Department of Thoracic Surgery, Fourth HospitalHebei Medical University Shijiazhuang China
12. Department of Thoracic SurgeryUniversity Hospitals Leuven Belgium
13. Department of SurgeryHospital Britanico de Buenos Aires Buenos Aires Argentina
14. Klinik St. Anna Hirslanden Lucerne Switzerland
15. Department of SurgeryUniversity of Washington Seattle Washington
16. Division of Gastroenterology and Hepatology, Department of MedicineMayo Clinic Rochester Minnesota
17. Department of SurgeryUniversity of Michigan Ann Arbor Michigan