1. Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden;
2. Department of Medicine, Emergency and Geriatrics, Sahlgrenska University Hospital/East Hospital, Gothenburg, Sweden;
3. Department of Gastroenterology, Ersta Hospital, Stockholm, Sweden;
4. Department of Clinical and Experimental Medicine, Division of Gastroenterology and Hepatology, Faculty of Health Sciences, Linköping University, Linköping, Sweden;
5. Department of Internal Medicine, Sahlgrenska University Hospital/Mölndal, Gothenburg, Sweden;
6. Department of Medicine, Trelleborg Hospital, Trelleborg, Sweden;
7. Department of Pathology and Cytology, Aleris Medilab, Täby, Sweden