1. University Clinic for Gastroenterohepathology Skopje Republic of North Macedonia
2. Faculty of Medicine Ss. Cyril and Methodius University in Skopje Skopje Republic of North Macedonia
3. University Clinic of Thoracic and Vascular Surgery Skopje Republic of North Macedonia
4. University Clinic for State Cardiac Surgery Skopje Republic of North Macedonia
5. University Clinic of Digestive surgery Skopje Republic of North Macedonia
6. Department of Gastroenterology and Liver Unit Royal Cornwall Hospitals NHS trust Truro England UK
7. University School of Medicine Peninsula NHS Education London England Southwest UK
8. University Clinic of Radiology Skopje Republic of North Macedonia
9. School of Medicine, University of Mostar Mostar Bosnia and Herzegovina
10. Department of Gastroenterology University Hospital Mostar Mostar Bosnia and Herzegovina