[1] Villa Sofia Cervello Hosp, IBD Unit, Palermo, Italy
[2] Univ Palermo, Dept Sci Hlth Promot G DAlessandro, Palermo, Italy
[3] Maggiore Hosp, Gastroenterol Pediat Unit, Bologna, Italy
[4] Luigi Sacco Univ Hosp, Infect Dis Unit, Dept Biomed & Clin Sci, Milan, Italy
[5] Univ Cattolica Sacro Cuore, IBD Unit, Presidio Columbus Fdn Policlin Univ A Gemelli IRC, Rome, Italy
[6] Univ Milan, Dept Biochem & Clin Sci L Sacco, ASST Fatebenefratelli Sacco, Milan, Italy