M. Guirgis¹, E. Wendt¹, L.M. Wang², P. Basset³, D. Burger¹, A. Kent¹, R. Adamson¹, S. Travis¹, S. Keshav¹, ¹Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, United Kingdom, ²Department of Cellular Pathology, John Radcliffe Hospital, Oxford, United Kingdom, ³StatsConsultancy Limited, United Kingdom

R. Deberry, A. Rahman, P. Dubois, G. Chung-Faye, B. Hayee*

King's College Hospital NHS Foundation Trust, Gastroenterology, London, United Kingdom

D.A. Winter¹, J.C. Escher¹, E. Porto², IBD Working Group of ESPGHAN, ¹Erasmus MC-Sophia Children's Hospital, Pediatric Gastroenterology, Rotterdam, Netherlands, ²European Society for Paediatric Gastroenterology, Hepatology and Nutrition, Porto, Portugal

D. Trabulo¹, C. Martins¹, S. Ribeiro¹, C. Cardoso¹, J. Mangualde¹, I. Cremers¹, A.P. Oliveira¹, ¹Centro Hospitalar de Setúbal – Hospital de São Bernardo, Gastroenterology, Setúbal, Portugal

M. Cappello*, R. Alloro, M. Mazza, M. Mendolaro, P.L. Almasio, A. Craxì

University of Palermo, Gastroenterology Section, DiBiMis, Palermo, Italy

M. Daperno^1,2, G. Canavese³, R. Suriani¹, A. Sapino³, R. Rocca^1,2, V. Villanacci⁴, O. Onlus¹, on behalf of Fondazione IBD, ¹Fondazione IBD Onlus, IBD Foundation, Torino, Italy, ²AO Ordine Mauriziano, Gastroenterology Division, Turin, Italy, ³AO S. Giovanni Battista – Città della Salute, Pathology Department, Torino, Italy, ⁴Spedali Civili di Brescia, Pathology Depratment, Brescia, Italy

A.-M.K. Fiehn¹, C. Bjørnbak², M. Warnecke³, P.J.H. Engel¹, L.K. Munck², ¹Roskilde Sygehus, Dept. of Pathology, Roskilde, Denmark, ²Køge sygehus, Dept. of Int. Med., Køge, Denmark, ³Slagelse Sygehus, Dept. of Pathology, Slagelse, Denmark

C. Soendergaard*¹, O.H. Nielsen¹, J.B. Seidelin¹, P.H. Kvist², J.T. Bjerrum¹

¹Herlev University Hospital, Department of Gastroenterology, Copenhagen, Denmark, ²Novo Nordisk A/S, Histology, Maaloev, Denmark

E. Vicente¹, S. Pérez², M. Chaparro³, F. Rodríguez-Salvanés⁴, S. Castañeda¹, J.P. Gisbert³, ¹Hospital La Princesa, IIS-P, Rheumatology Department, Madrid, Spain, ²Fundación Jiménez Díaz, Rheumatology Department, Madrid, Spain, ³Hospital Universitario de La Princesa, IP and CIBERehd, Gastroenterology Unit, Madrid, Spain, ⁴Hospital La Princesa, IIS-P, Epidemiologic Research Unit, Madrid, Spain

S.P. Travis¹, D. Schnell², P. Krzeski³, J.-F. Colombel⁴, B.G. Feagan⁵, W. Reinisch⁶, B.E. Sands⁷, B.R. Yacyshyn⁸, C.A. Bernhardt⁹, J.-Y. Mary¹⁰, W.J. Sandborn¹¹, ¹Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, United Kingdom, ²Middletown, United States, ³Warner Chilcott, Weybridge, United Kingdom, ⁴Hôpital Claude Huriez, Centre Hospitalier Universitaire de Lille, Lille, France, ⁵University of Western Ontario, Robarts Clinical Trials, Robarts Research Institute, Ontario, Canada, ⁶Universitatsklinik Innere Medizin III, Abteilung Gastroenterologie und Hepatologie, Medical University of Vienna, Vienna, Austria, ⁷Mount Sinai Hospital, New York, United States, ⁸University of Cincinnati, Division of Digestive Diseases, Cincinnati, Ohio, United States, ⁹Bernhardt Regulatory Consulting, Cincinnati, Ohio, United States, ¹⁰INSERM U717 Biostatistics and Clinical Epidemiology, Universite Paris Diderot, Paris, France, ¹¹Division of Gastroenterology, University of California San Diego, La Jolla, California, United States

M.H. Mosli*^{1, 2}, G. Zou^{1, 3}, S.K. Garg⁴, S.G. Feagan¹, J.K. MacDonald¹, W.J. Sandborn^{1, 5}, N. Chande⁶, B.G. Feagan^{1, 3, 7}

¹Robarts Clinical Trials Inc., Robarts Research Institute, University of Western Ontario, London, Ontario, Canada, ²King Abdulaziz University, Department of Medicine, Jeddah, Saudi Arabia, ³University of Western Ontario, Department of Epidemiology and Biostatistics, London Ontario, Canada, ⁴University of Minnesota, Department of Medicine, Minneapolis, United States, ⁵University of California San Diego, Division of Gastroenterology, La Jolla, United States, ⁶London Health Sciences Centre, Victoria Hospital, London, Canada, ⁷University of Western Ontario, Department of Medicine, London , Canada

J. Haapamäki¹, H. Sintonen², N. Barner-Rasmussen¹, M. Färkkilä¹, ¹Helsinki University Central Hospital, Division of Gastroenterology, Helsinki, Finland, ²University of Helsinki, Department of Public Health, Hjelt Institute, Helsinki, Finland

L. Guidi¹, M. Marzo¹, G. Andrisani¹, C. Felice¹, D. Pugliese¹, I. De Vitis¹, A. Papa¹, G.L. Rapaccini¹, F. Forni², A. Armuzzi¹, ¹Internal Medicine and Gastroenterology Unit, Complesso Integrato Columbus, Catholic University, Rome, Italy, ²Clinical Laboratory Unit, Complesso Integrato Columbus, Catholic University, Rome, Italy