1 Department of Biomedical Sciences, Humanitas University, Milan, Italy.
2 Department of Gastroenterology, Besançon University Hospital, Bourgogne-Franche-Comté University, Besançon, France.
3 Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France.
4 Department of Biomedical Sciences, Humanitas University, Milan, Italy; IBD Center, Humanitas Clinical and Research Center, IRCCS, Rozzano, Milan, Italy. Electronic address: sdanese@hotmail.com.