1. Visceral Surgery DepartmentGeneva University Hospital Geneva Switzerland
2. Department of Radiation OncologyGeneva University Hospital Geneva Switzerland
3. Faculty of MedicineGeneva University Geneva Switzerland
4. Department of Thoracic Surgery, Shanghai Chest Hospital Clinical Center for Esophageal DiseasesShanghai Jiaotong University Shanghai China
5. Gastroenterology and HepatologyUniversity of Kansas Medical Center Kansas City Kansas
6. Gastroenterology and HepatologyVeterans Affairs Medical Center Kansas City Missouri
7. Department of General and Visceral Surgery, Faculty of MedicineUniversity of Freiburg Medical Center Freiburg Germany