1Department of Gastroenterology and Hepatology, Westmead Hospital, Sydney, New South Wales, Australia;

2Westmead Clinical School, University of Sydney, Sydney, New South Wales, Australia;

3Department of Gastroenterology and Hepatology, Auburn Hospital, Sydney, New South Wales, Australia;

4Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada;

5Department of Medicine, University of Calgary, Cumming School of Medicine, Calgary, Alberta, Canada;

6Forzani and MacPhail Colon Cancer Screening Centre, Calgary, Alberta, Canada.

Correspondence: Michael J. Bourke, MBBS. E-mail: [email protected]. Steven J. Heitman, MD, MSc. E-mail: [email protected].

*Steven J. Heitman, MD, MSc and Michael J. Bourke, MBBS are co-corresponding