1 IBD-unit, Clinical Unit for Chronic Bowel Disorders, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy. Electronic address: aviola@unime.it.
2 IBD-unit, Clinical Unit for Chronic Bowel Disorders, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy.
3 IBD-unit, Clinical Unit for Chronic Bowel Disorders, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy; Section of Gastroenterology and Hepatology, PROMISE, Policlinico Universitario Paolo Giaccone, Palermo, Italy.
4 Endoscopy-unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy.