1. Carl von Ossietzky University of Oldenburg; Department of Health Services Research; Oldenburg Germany 26111
2. University of Western Ontario; Schulich School of Medicine & Dentistry; London ON Canada
3. London Health Sciences Centre - Victoria Hospital; Room E6-321A 800 Commissioners Road East London ON Canada N6A 5W9
4. Robarts Research Institute; Robarts Clinical Trials; P.O. Box 5015 100 Perth Drive London ON Canada N6A 5K8
5. Robarts Clinical Trials; Cochrane IBD Group; 100 Dundas Street, Suite 200 London ON Canada N6A 5B6
6. University of Western Ontario; Department of Medicine; London ON Canada