1. Unger-Vetlesen Institute, Lovisenberg Diaconal Hospital, Oslo, Norway
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
3. PatoGen AS, Ålesund, Norway
4. Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders, Innlandet Hospital Trust, Brumunddal, Norway
5. Institute of clinical medicine, UiT - Norway’s Arctic University, Tromsø, Norway
6. Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
7. Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
8. Department of Gastroenterology, Oslo University Hospital, Oslo, Norway