1. Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada;
2. Division of Gastroenterology and Hepatology, Department of Medicine, University of Calgary, Calgary, Alberta, Canada;
3. Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada;
4. Department of Cancer Epidemiology and Prevention Research, Cancer Care Alberta, Alberta Health Services, Calgary, Alberta, Canada;
5. Division of Gastroenterology and Hepatology, McGill University Health Centre, McGill University, Montreal, Quebec, Canada;
6. Division of Gastroenterology, Department of Medicine, Faculty of Medicine, University of British Columbia, Victoria, British Columbia, Canada;
7. Division of Gastroenterology, Department of Medicine, Queen's University, Kingston, Ontario, Canada;
8. Division of Gastroenterology, Oakville Trafalgar Memorial Hospital, Oakville, Ontario, Canada;
9. Division of Gastroenterology, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada;
10. Division of Gastroenterology, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada;
11. Li Ka Shing Knowledge Institute, University of Toronto, Toronto, Ontario, Canada;
12. Department of Gastroenterology and Hepatology, Erasmus MC–University Medical Center, Rotterdam, the Netherlands;
13. Center for Interventional Gastroenterology at UTHealth, McGovern Medical School, Houston, Texas, USA;
14. Division of Cardiology, Department of Medicine, McMaster University, Hamilton, Ontario, Canada;
15. Division of Hematology, Department of Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada;
16. Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada;
17. Department of Medicine, Faculty of Medicine–Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia;
18. Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA;
19. Division of Gastroenterology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA;
20. Division of Gastroenterology and Hepatology, Medical University of South Carolina, Charleston, South Carolina, USA;
21. Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.