1. Institute of Information Theory and Automation, The Czech Academy of Sciences, Pod vodárenskou veží 4, 182 08 Prague 8, Czech Republic
2. Charles University, Second Department of Internal Medicine-Gastroenterology, Faculty of Medicine and University Hospital, Sokolská 581, Hradec Králové 500 05, Czech Republic
3. University of Hradec Králové, Center for Basic and Applied Research, Faculty of Informatics and Management, Hradecká 1249, Hradec Králové 500 03, Czech Republic