1. Division of Gastroenterology, Western University, London, Ontario, Canada
2. Department of Medicine, Grand River Hospital, Kitchener, Ontario, Canada
3. Independent Researcher, London, Ontario, Canada
4. Library Services, London Health Sciences Centre, London, Ontario, Canada
5. Digestive Diseases Department, HCA Healthcare UK, London, United Kingdom
6. Lawson Health Research Institute, London Health Sciences Centre, London, Ontario, Canada
7. Department of Epidemiology and Biostatistics, Western University, London, Ontario, Canada