1. Gastroenterology Department “Alexandra” General Hospital of Athens Athens Greece
2. Department of Gastroenterology Korgialenio‐Mpenakeio Hellenic Red Cross Hospital Athens Greece
3. Hepatogastroenterology Unit Second Department of Internal Medicine ‐ Propaedeutic Medical School National and Kapodistrian University of Athens Attikon University General Hospital Athens Greece
4. Department of Gastroenterology St. Savvas Oncology Hospital of Athens Athens Greece
5. Department of Gastroenterology NIMTS Hospital Athens Greece
6. Department of Gastroenterology “Konstantopoulio‐Patision” General Hospital Athens Greece