1. UCL: Université Catholique de Louvain – Institute of Health and Society, Belgium
2. Department of Gastroenterology University Hospital CHU Liège, Belgium
3. Section of Gastroenterology and Hepatology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
4. Department of Gastroenterology, Icahn Medical School at Mount Sinai, New York, NY, USA