1. Department of Upper Abdominal Diseases Karolinska University Hospital Stockholm Sweden
2. Department of Medicine Huddinge Karolinska Institutet Stockholm Sweden
3. Department of Oto‐Rhino‐Laryngology, Head and Neck Surgery Karolinska University Hospital Stockholm Sweden
4. Department of Clinical Science, Intervention and Technology (CLINTEC) Karolinska Institutet Stockholm Sweden
5. Department of Surgery Södersjukhuset Stockholm Sweden
6. Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet Stockholm Sweden
7. Medical Unit Clinical Nutrition Karolinska University Hospital Stockholm Sweden