1. Institute of Clinical and Preventive Medicine & Faculty of Medicine; University of Latvia; Riga Latvia
2. Department of Research; Riga East University Hospital; Riga Latvia
3. Digestive Diseases Centre GASTRO; Riga Latvia
4. Division of Cancer Epidemiology and Genetics; National Cancer Institute; Bethesda USA
5. Faculty of Computer Sciences and Information Technology; Riga Technical University; Riga Latvia
6. Academic Histology laboratory; Riga Latvia
7. Lithuanian University of Healthcare; Kaunas Lithuania