M. de Jong*¹, J. Degens¹, T. van den Heuvel¹, M. Romberg-Camps², B. Winkens³, T. Markus⁴, A. Masclee¹, A. van Tubergen⁵, D. Jonkers¹, M. Pierik¹

¹MUMC, division Gastroenterology-Hepatology, Maastricht, Netherlands, ²ORBIS Medical Centre, Gastroenterology and Hepatology, Sittard, Netherlands, ³Maastricht University, Department of Methodology and Statistics, Maastricht, Netherlands, ⁴CCUVN, CCUVN, Woerden, Netherlands, ⁵MUMC, division Rheumatology, Maastricht, Netherlands

J. Maljaars, K. Sebib Korkmaz, A. Van der Meulen, B. van Hoek, Leiden University Medical Center, Gastroenterology and Hepatology, Leiden, Netherlands

E. Belousova¹, E. Volchkova¹, E. Rusanova², M. Podlesskikh¹, O. Tsodikova¹, ¹Moscow Regional Research Clinical Institute, Gastroenerology, Moscow, Russian Federation, ²Moscow Regional Research Clinical Institute, Laboratory, Moscow, Russian Federation

G. Fiorino*¹, C. Bonifacio², M. Allocca¹, M. Alfieri¹, M. Sacchi³, I. Bravatà⁴, D. Gilardi¹, P. Turri¹, M. Delliponti¹, A. Spinelli³, L. Balzarini², A. Repici⁴, L. Peyrin-Biroulet⁵, S. Danese¹

¹Humanitas Research Hospital, IBD Center, Gastroenterology, Rozzano, Milan, Italy, ²Humanitas Research Hospital, Radiology, Rozzano, Milan, Italy, ³Humanitas Research Hospital, IBD Surgery, Colo-rectal Surgery, Rozzano, Milan, Italy, ⁴Humanitas Research Hospital, Endoscopy Unit, Gastroenterology, Rozzano, Milan, Italy, ⁵Nancy University Hospital, Université de Lorraine, Gastroenterology and Hepatology, Vandoeuvre-les-Nancy, France

E. De Greef¹, J.M. Mahachie John², I. Hoffman³, F. Smets⁴, S. Van Biervliet⁵, P. Bontems⁶, I. Paquot⁷, P. Alliet⁸, K. Van Steen², G. Veereman¹, ¹UZ Brussel, Pediatric Gastroenterology, Jette, Belgium, ²Montefiori Institute, Systems and Modelling Unit, Liege, Belgium, ³UZ Gasthuisberg, Pediatric Gastroenterology, Leuven, Belgium, ⁴UCL St Luc, Pediatric Gastroenterology, Brussels, Belgium, ⁵UZ Gent, Pediatric Gastroenterology, Gent, Belgium, ⁶HUDERF, Pediatric Gastroenterology, Brussels, Belgium, ⁷CHC de l'espérance, Pediatric Gastroenterology, Liège, Belgium, ⁸Jessa Hospital, Pediatric Gastroenterology, Hasselt, Belgium

T. Lobaton Ortega¹, E. Dueñas¹, A. Lopez-Garcia¹, F. Rodriguez-Moranta¹, L. Carolina², X. San Juan², L. Rodriguez¹, A. Ruiz¹, J. Guardiola¹, ¹Hospital Universitari Bellvitage, Gastroenterology, Barcelona, Spain, ²Hospital Universitari Bellvitage, Pathology, Barcelona, Spain

V. Jairath*¹, C. Parker², G. Zou^{2, 3}, J.K. MacDonald², T. Alameel⁴, M. Albeshir⁴, M. Almadi⁵, T. Altaweel⁶, N. Atkinson¹, S. Biswas¹, T. Chapman¹, P.S. Dulai⁷, M. Glaire⁸, D. Hoekman⁹, A. Koutsoumpas¹, E. Minas¹⁰, M.H. Mosli^{2, 11}, M.A. Samaan^{2, 9}, M.K. Vandervoort², S.P. Travis¹², G. D'Haens^{2, 9}, B.G. Levesque^{2, 7}, W.J. Sandborn^{2, 7}, B.G. Feagan^{2, 3, 13}

¹Oxford University Hospital, Translational Gastroenterology Unit, Oxford, United Kingdom, ²Robarts Clinical Trials Inc., Robarts Research Institute, University of Western Ontario, London, Ontario, Canada, ³University of Western Ontario, Department of Epidemiology and Biostatistics, London Ontario, Canada, ⁴King Fahad Specialist Hospital-Dammam, Department of Medicine, Dammam, Saudi Arabia, ⁵King Khalid University Hospital, Division of Gastroenterology, Riyadh, Saudi Arabia, ⁶Mubarak Al-Kabeer Hospital, Division of Gastroenterology, Jabriyah, Kuwait, ⁷University of California San Diego, Division of Gastroenterology, La Jolla, United States, ⁸John Radcliffe Hospital, Department of Gastroenterology, Oxford, United Kingdom, ⁹University of Amsterdam, Academic Medical Center, Amsterdam, Netherlands, ¹⁰Wexham Park Hospital, Department of Gastroenterology, Slough, United Kingdom, ¹¹King Abdulaziz University, Department of Medicine, Jeddah, Saudi Arabia, ¹²John Radcliffe Hospital, Translational Gastroenterology Unit, Oxford, United Kingdom, ¹³University of Western Ontario, Department of Medicine, London , Canada

Y. He¹, Z. Zhu², Y. Chen³, W. Liao², C. Ouyang⁴, M. Huang⁵, R. Hu⁶, Y. Yang⁷, J. Qian⁷, Q. Ouyang⁶, X. Wu⁴, B. Xia⁵, N. Lv², M. Chen¹, P. Hu¹, ¹The First Affiliated Hospital of SunYat-Sen University, Gastroenterology, Guangzhou, China, ²The First Affiliated Hospital of Nanchang University, Gastroenterology, Nanchang, China, ³The First Affiliated Hospital of SunYat-Sen University, Medical Ultrasonics, Guangzhou, China, ⁴The Second Xiangya Hospital of Central South University, Gastroenterology, Changsha, China, ⁵Zhongnan Hospital of Wuhan University, Gastroenterology, Wuhan, China, ⁶West China Hospital, Sichuan University, Gastroenterology, Sichuan, China, ⁷Peking Union Medical College Hospital, Gastroenterology, Beijing, China

K. Matsuoka¹, F. Ueno², T. Matsui³, M. Watanabe⁴, T. Hibi¹, ¹Keio University School of Medicine, Gastroenterology and Hepatology, Tokyo, Japan, ²Ofuna Chuo Hospital, Kanagawa, Japan, ³Fukuoka University Chikushi Hospital, Gastroenterology, Fukuoka, Japan, ⁴Tokyo Medical and Dental University, Gastroenterology and Hepatology, Tokyo, Japan

R. Ferreiro*, M. Barreiro-de Acosta, N. Vallejo, D. De la Iglesia, L. Urisarri, I. Baston, A. Lorenzo, J.E. Dominguez-Munoz

University Hospital Santiago de Compostela, Gastroenterology, Santiago, Spain

C. Gonen¹, Y. Gokden¹, A. Salturk¹, K. Kochan¹, S. Ozkara², ¹Haydarpasa Numune Training and Research Hospital, Department of Gastroenterology, Istanbul, Turkey, ²Haydarpasa Numune Training and Research Hospital, Department of Pathology, Istanbul, Turkey

T. Kobayashi^1,2,3, N. Hosoe², K. Matsuoka³, M. Naganuma², M. Nakano¹, Y. Ishibashi³, K. Kimura³, K. Yoneno³, S. Usui³, K. Kashiwagi², T. Hisamatsu³, N. Inoue², H. Serizawa¹, N. Watanabe¹, T. Kanai³, H. Imaeda⁴, T. Hibi³, H. Ogata², ¹Kitasato University Kitasato Institute Hospital, Inflammatory Bowel Disease Center, Tokyo, Japan, ²Keio University, Center for Diagnostic and Therapeutic Endoscopy, Tokyo, Japan, ³Keio University, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Tokyo, Japan, ⁴Department of General Internal Medicine, Saitama Medical University, Saitama, Japan