1. Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen , Groningen , the Netherlands
2. The Henry D. Janowitz Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai , New York, NY , USA
3. Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen , Groningen , the Netherlands