University of Oxford - Nuffield Department of Surgical Sciences, Utrecht University - Department of Upper Gastrointestinal Surgery, Utrecht University - Department of Upper Gastrointestinal Surgery, Catharina Hospital - Department of Surgery, Catharina Hospital - Department of Surgery, Zuyderland Medical Center - Department of Surgery, Zuyderland Medical Center - Department of Surgery, Erasmus University Rotterdam (EUR) - Department of Surgery, Erasmus University Rotterdam (EUR) - Department of Surgery, Leiden University - Department of Surgery, Leiden University - Department of Surgery, ZGT Hospitals - Department of Surgery, Gelre Hospital - Department of Surgery, Meander Medical Center - Department of Surgery, University of Amsterdam - Department of Surgery, University of Amsterdam - Department of Surgery, University of Amsterdam - Department of Surgery, Utrecht University - Julius Center for Health Sciences and Primary Care, Utrecht University - Department of Upper Gastrointestinal Surgery, Utrecht University - Department of Surgery, Independent and Independent