1. Digestive Endoscopy Unit, Department of Medicine, “Villa Sofia-Cervello” Hospital, Palermo, 90100, Italy
2. Gastroenterology & Endoscopy Unit, S. Elia-Raimondi Hospital, Caltanissetta, 93100, Italy
3. Inflammatory Bowel Disease Unit, Department of Medicine, “Villa Sofia-Cervello” Hospital, Palermo, 90100, Italy