1. Department of Gastroenterology and Alimentary Tract Surgery, Tampere University Hospital, Teiskontie 35, PO BOX 2000, 33521 Tampere, Finland
2. Department of Gastroenterology and Alimentary Tract Surgery, Tampere University Hospital, Tampere, Finland
3. Department of Radiology, Imaging Centre and Pharmacy, Tampere University Hospital, Tampere, Finland
4. Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland