1. Department of Surgery, Maastricht University Medical Centre, Maastricht, The Netherlands
2. Nutrim School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
3. Department of Surgery, University Hospital Aachen, Aachen, Germany
4. Department of Methodology and Statistics, Maastricht University Medical Centre, Maastricht, The Netherlands
5. CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, The Netherlands
6. Department of Surgery, Academic Medical Centre, Amsterdam, The Netherlands
7. Department of Surgery, San Raffaele Hospital, Milan, Italy
8. Department of Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands
9. Department of Surgery, Maxima Medical Centre, Veldhoven, The Netherlands
10. Department of Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
11. Department of Surgery, Deventer Hospital, Deventer, The Netherlands
12. Department of Surgery, University Medical Centre Groningen, Groningen, The Netherlands
13. Department of Surgery, Medisch Spectrum Twente, Enschede, The Netherlands
14. GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
15. Erasmus Medical Centre, Rotterdam, The Netherlands
16. University Medical Centre Groningen, Groningen, The Netherlands
17. Academic Medical Centre, Amsterdam, The Netherlands
18. University Medical Centre Utrecht, Utrecht, The Netherlands
19. Jeroen Bosch Hospital, Den Bosch, The Netherlands
20. Leiden University Medical Centre, Leiden, The Netherlands
21. Westfriesgasthuis, Hoorn, The Netherlands
22. Onze Lieve Vrouw Gasthuis, Amsterdam, The Netherlands
23. Isala, Zwolle, The Netherlands
24. University Hospital Aachen, European HPB Centre Aachen–Maastricht, Aachen, Germany
25. University Hospital Southampton, Southampton, UK
26. Hôpitaux Universitaires Paris Sud, Paris, France
27. Hôpital Henri-Mondor, Paris, France
28. University Hospital Leuven, Leuven, Belgium
29. Oslo University Hospital, Oslo, Norway
30. Medisch Spectrum Twente, Enschede, The Netherlands
31. Maastricht University Medical Centre, European HPB Centre Aachen–Maastricht, Maastricht, The Netherlands