Author information:
(1)Department of Medical and Surgical Sciences, IBD Unit, University of Bologna, 
Bologna, Italy. Electronic address: Paolo.gionchetti@unibo.it.
(2)Department of Medical and Surgical Sciences, IBD Unit, University of Bologna, 
Bologna, Italy.
(3)AOU Gastroenterology, Careggi University Hospital, Florence, Italy.
(4)IBD Unit Complesso Integrato Columbus-Gemelli Hospital Catholic University 
Foundation, Rome, Italy.
(5)University "Tor Vergata", Department of Systems Medicine, Rome, Italy.
(6)Gastroenterology Unit, Federico II University, Naples, Italy.
(7)Gastrointestinal Unit, Ospedale Central Hospital, Bolzano, Italy.
(8)Department of Medicine, Pneumology and Nutrition Clinic, V. Cervello 
Hospital, Ospedali Riuniti Villa Sofia-Cervello University of Palermo, Palermo, 
Italy.
(9)IBD Center, Humanitas Clinical and Research Centre, Milan, Italy.
(10)Gastroenterology Unit, A.O. Ordine Mauriziano Hospital, Turin, Italy.
(11)Department of Surgical and Gastroenterological Sciences, University of 
Padua, Padua, Italy.
(12)Clinical Unit for Chronic Bowel Disorders, Department of Internal Medicine, 
IBD Unit Messina, University of Messina, Messina, Italy.
(13)Department of Gastroenterology, San Camillo-Forlanini Hospital, Rome, Italy.
(14)Gastroenterology Unit, San Filippo Neri Hospital, Rome, Italy.
(15)Gastroenterology and Gastrointestinal Endoscopy Unit, IRCCS San Donato 
Hospital, San Donato Milanese, Italy.
(16)Gastroenterology and Digestive Endoscopy, ASST Fatebenefratelli Sacco, 
University of Milan, Milan, Italy.