1. Department of Medicine; University of Western Ontario; London ON Canada
2. Robarts Clinical Trials Inc.; University of Western Ontario; London ON Canada
3. Department of Epidemiology and Biostatistics; University of Western Ontario; London ON Canada
4. Inflammatory Bowel Disease Centre; Academic Medical Centre; Amsterdam The Netherlands
5. Division of Gastroenterology; University of California San Diego; La Jolla CA USA
6. SALIX Pharmaceuticals, Inc.; Raleigh NC USA