1. IBD Center; Department of Gastroenterology; Humanitas Clinical and Research Center; Milan Italy
2. Hellenic Center for Disease Control and Prevention; Athens Greece
3. Department of Experimental and Health Sciences; Pompeu Fabra University; Barcelona Spain
4. Barcelona Institute for Global Health; Barcelona Spain
5. Medical School; University of Cyprus; Nicosia Cyprus
6. Department of Hepato-Gastroenterology and Inserm U954; University Hospital of Nancy; University of Lorraine; Vandoeuvre-lès-Nancy France
7. Department of Biomedical Sciences; Humanitas University; Milan Italy