1. Department of Internal Medicine, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
2. University of Manitoba Inflammatory Bowel Disease Clinical and Research Centre, Winnipeg, Manitoba, Canada
3. Department of Clinical Health Psychology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
4. Department of Community Health Sciences, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
5. Gastroenterology Department and Inserm U954, Nancy University Hospital, Université de Lorraine, Nancy, France
6. Public Health, Epidemiology and Economic Health, Registre Epimad, Maison Régionale de la Recherche Clinique, Centre Hospitalier Universitaire Régional, Lille Cedex, France
7. Lille Inflammation Research International Center LIRIC-UMR 995 Inserm/Université Lille 2/CHRU de Lille; Equipe IBD and environmental factors: epidemiology and functional analyses, Lille University, France