1. Gastroenterology Department, Sismanogleio‑Amalia Fleming General Hospital, 15126 Athens, Greece
2. Histopathology Department, Sismanogleio‑Amalia Fleming General Hospital, 15126 Athens, Greece
3. Department of Quality Control, Research and Continuing Education, Sismanogleio‑Amalia Fleming General Hospital, 15126 Athens, Greece
4. General Manager, Sismanogleio‑Amalia Fleming General Hospital, 15126 Athens, Greece
5. University of Crete Medical School, 71500 Heraklion, Greece