1. Robarts Clinical Trials Inc.; University of Western Ontario; London Ontario Canada
2. Department of Gastroenterology; University of Ghent; Ghent Belgium
3. Department of Gastroenterology; Ljubljana University Medical Centre; Ljubljana Slovenia
4. Department of Medicine and Farncombe Family Digestive Health Research Institute; Division of Gastroenterology; McMaster University; Hamilton Ontario Canada
5. Department of Medicine; University of Western Ontario; London Ontario Canada
6. Division of Gastroenterology; University of California San Diego; La Jolla California USA
7. Inflammatory Bowel Disease Centre; Academic Medical Centre; Amsterdam The Netherlands
8. Department of Epidemiology and Biostatistics; University of Western Ontario; London Ontario Canada