1. IBD Unit, Villa Sofia Cervello Hospital; Palermo Italy
2. Department of Pro.M.I.S.E. "Giuseppe D'Alessandro," Section of Dermatology; University of Palermo, AOUP Paolo Giaccone; Palermo PA Italy
3. Department of Pro.M.I.S.E. "Giuseppe D'Alessandro," Section of Pathology; University of Palermo, AOUP Paolo Giaccone; Palermo PA Italy