1. Department of Gastroenterology and Alimentary Tract Surgery; Tampere University Hospital; Tampere Finland
2. University of Tampere; Tampere Finland
3. Department of Clinical Neurophysiology; Neuroscience; HUS Medical Imaging Centre; University of Helsinki; Helsinki University Hospital; Helsinki Finland
4. Päijät-Häme Central Hospital; Lahti Finland
5. Department of Gastroenterology; the Royal Derby Hospital; Derby UK
6. Department of Medicine; Faculty of Medicine and Life-Sciences; Tampere University Hospital; University of Tampere; Tampere Finland