Affiliation: | (1) Digestive Diseases Centre GASTRO, Riga Eastern Clinical University Hospital, University of Latvia, 6 Linezera iela, Riga, 1006, Latvia;(2) Faculty of Medicine, Kaunas University of Medicine, Eiveniu 2, 50009 Kaunas, Lithuania;(3) Faculty of Medicine, University of Latvia, 6 Linezera iela, Riga, 1006, Latvia;(4) Department of Internal Medicine, National Taiwan University Hospital, 7 Chung-Shan S. Rd., Taipei, Taiwan, ROC |