1. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States
2. Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts, United States
3. Division of Surgery, Mayo Clinic, Rochester, Minnesota, United States
4. Department of Gastroenterology-Hepatology, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
5. Department of Surgery, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
6. Department of Surgery, Department of Gastroenterology-Hepatology, Department of Advanced Interventional Endoscopy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium