1. Gastroenterology Clinic – Jessenius Faculty of Medicine, Comenius University in Bratislava (JFM CU), Martin, Slovakia;
2. Clinic of Radiology – Jessenius Faculty of Medicine, Comenius University in Bratislava (JFM CU), Martin, Slovakia;
3. Department of Surgery, Department of Gastroenterology-Hepatology and Department of Advanced Interventional Endoscopy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium