1. Inflammatory Bowel Disease Clinic, Department of Medicine, University of Calgary, Calgary, Alberta, Canada;
2. Alberta Precision Laboratories, Public Health Laboratory, Alberta, Canada;
3. Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada;
4. Division of Infectious Diseases, Department of Medicine, University of Calgary, Calgary, Alberta, Canada;
5. Department of Medical Microbiology and Immunology, Li Ka Shing Institute of Virology, University of Alberta, Edmonton, Alberta, Canada;
6. Department of Clinical Neuroscience, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada;
7. University of Manitoba IBD Clinical and Research Centre and Department of Medicine, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada;
8. Department of Microbiology, Immunology and Infectious Disease, University of Calgary, Calgary, Alberta, Canada;
9. Divisions of Rheumatology and Clinical Epidemiology, Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada;
10. ICES, Toronto, Ontario, Canada;
11. SickKids Inflammatory Bowel Disease Centre, Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, Ontario, Canada;
12. Department of Paediatrics and Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.