1. Department of Internal Medicine, McGill University Health Centre, Montreal, Canada
2. Department of Gastroenterology, L’Hôpital Cité-de-la-Santé, Laval, Canada
3. Department of Gastroenterology, McGill University Health Centre, Canada
4. Department of Pathology, McGill University Health Centre, Canada
5. Department of Dermatology, Sir Mortimer B Davis Jewish General Hospital, Canada
6. Department of Neurology, McGill University Health Centre, Montreal, Quebec, Canada