1. Department of Surgery, Institute of Gastroenterology, Tokyo Women’s Medical University, Kawada 8-1, Shinjyuku, Tokyo, 1628666, Japan
2. Medical Faculty, University of Cologne, Kerpener Str. 62, Cologne, 50924, Germany
3. Head Contilia Center for Esophageal Diseases, Elisabeth Hospital, Klara-Kopp-Weg 1, Essen, 45138, Germany
4. Institute of Pathology, University of Cologne, Kerpener Str. 62, Cologne, 50924, Germany
5. Department of General, Visceral & Cancer Surgery, University of Cologne, Kerpner Str. 62, Cologne, 50924, Germany
6. Department of General, Visceral, Thoracic & Cancer Surgery, Caritas Klinikum, Rhine Str. 2, Saarbrücken, 66113, Germany