1. Department of Molecular Medicine and Surgery, Upper Gastrointestinal Surgery, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden;
2. Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, Levanger, Norway;
3. Department of Medicine, Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway;
4. School of Cancer and Pharmaceutical Sciences, King’s College London, London, UK