The second European evidence-based Consensus on the diagnosis and management of Crohn's disease: Definitions and diagnosis
Van Assche G., Dignass A., Panes J., Beaugerie L., Karagiannis J., Allez M., Ochsenkühn T., Orchard T., Rogler G., Louis E., Kupcinskas L., Mantzaris G., Travis S., Stange E.