1. Upper Gastrointestinal Surgery, Department of Molecular medicine and Surgery; Karolinska Institutet, and Karolinska University Hospital; Stockholm Sweden
2. Cancer and Translational Medicine Research Unit, Medical Research Center; University of Oulu and Oulu University Hospital; Oulu Finland
3. Surgical Care Science, Department of Molecular medicine and Surgery; Karolinska Institutet, Karolinska University Hospital; Stockholm Sweden
4. School of Cancer and Pharmaceutical Sciences, King's College London, and Guy's and St Thomas' NHS Foundation Trust; London UK