1. Department of Internal Surgery, Levanger Hospital Nord‐Trøndelag Health Trust Levanger Norway
2. Department of Public Health and Nursing, NTNU, HUNT Research Centre Norwegian University of Science and Technology Levanger Norway
3. Department of Medicine, Levanger Hospital Nord‐Trøndelag Hospital Trust Levanger Norway
4. Upper Gastrointestinal Surgery, Department of Molecular Medicine and Surgery, Karolinska Institutet Karolinska University Hospital Stockholm Sweden
5. Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology Trondheim Norway
6. Regional Centre for Child and Youth Mental Health and Child Welfare‐Central Norway, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology Trondheim Norway