1. Department of Medicine, IBD Unit, “Villa Sofia-Cervello” Hospital, Palermo, Italy
2. Gastroenterology and Endoscopy Unit, “S. Elia-M. Raimondi” Hospital, Caltanissetta, Italy
3. Department of Health Promotion, Sciences, Maternal and Infant Care, Section of Gastroenterology and Hepatology, Internal Medicine and Medical Specialties, PROMISE, University of Palermo, Italy
4. Department of Medicine, IBD Unit, “Villa Sofia-Cervello” Hospital, Viale Strasburgo 233, Palermo 90146, Italy