1. Department of General Pediatrics Ostschweizer Kinderspital St. Gallen Switzerland
2. Department of Medicine III University Hospital, LMU Munich Munich Germany
3. Comprehensive Cancer Center, University Hospital, LMU Munich Munich Germany
4. German Cancer Consortium (DKTK); German Cancer Research Centre (DKFZ) Heidelberg Germany
5. Munich Cancer Registry (MCR), Ludwig‐Maximilians‐University of Munich Munich Germany
6. Institute of Medical Informatics, Biometry and Epidemiology (IBE), Ludwig‐Maximilians‐University of Munich Germany
7. Department of Surgery München Klinik Neuperlach Munich Germany
8. Department of Visceral Vascular and Endocrine Surgery, Martin‐Luther‐University Halle‐Wittenberg Germany
9. Department of Gastroenterology Hepatology and Gastrointestinal Oncology, München Klinik Bogenhausen Munich Germany
10. Department of Surgery Klinikum Landshut Landshut Germany
11. Department of Hematology Oncology and Palliative Care, München Klinik Harlaching and Neuperlach Munich Germany
12. Institute of Pathology, Ludwig‐Maximilians‐University of Munich Germany