1. State University of Campinas, Unicamp, São Paulo, Brazil
2. Toronto General Hospital, University Health Network, Toronto, Canada
3. Department of Medicine, St Michael’s Hospital, Toronto, Canada
4. Alberta Health Services, Edmonton, Canada
5. Department of Medicine, Division of Gastroenterology, University of British Columbia, Vancouver, Canada
6. Hamilton Health Sciences and McMaster University, Hamilton, Canada
7. Alberta Health Services, Calgary, Canada
8. Department of Medicine, University of Toronto, Toronto, Canada