T. Molnár¹, P.L. Lakatos², K. Farkas¹, A. Bálint¹, F. Nagy¹, Z. Szepes¹, P. Miheller³, K. Palatka⁴, T. Wittmann¹, ¹University of Szeged, First Department of Medicine, Szeged, Hungary, ²Semmelweis University, First Department of Medicine, Budapest, Hungary, ³Semmelweis University, Second Department of Medicine, Budapest, Hungary, ⁴University of Debrecen, Second Department of Medicine, Debrecen, Hungary

J. Ruel*¹, M. Ko², N. Patil², B. Jharap¹, D. Zhang², G. Roda¹, N. Harpaz¹, J.-F. Colombel³

¹Icahn School of Medicine at Mount Sinai, Department of Gastroenterology, New York, United States, ²Icahn School of Medicine at Mount Sinai, Medicine, New York, United States, ³Icahn School of Medicine at Mount Sinai, Division of Gastroenterology, New York, New York, United States

B. Hayee, P. Dubois, G. Chung-Faye, I. Bjarnason, King's College Hospital NHS Foundation Trust, Gastroenterology, London, United Kingdom

A. Echarri¹, V. Ollero¹, J.A. Rodriguez¹, J.C. Gallego², J. Castro¹, ¹Complejo Hospitalario Universitario de Ferrol, Gastroenterology, Spain, ²Complejo Hospitalario Universitario de Ferrol, Radiology, Spain

L. Peyrin-Biroulet*¹, A.S. Patel², J.O. Lindsay³

¹Nancy University Hospital, Université de Lorraine, Inserm U954 and Department of Gastroenterology, Vandouvre-les-Nancy, France, ²Abacus International, Systematic Review, Bicester, United Kingdom, ³The Royal London Hospital, Barts Health NHS Trust Department of Gastroenterology, London, United Kingdom

M. Sladek¹, D. Turner², T. Pfeffer Gik³, J. Amil Dias⁴, G. Veres⁵, R. Shaoul⁶, A. Staiano⁷, J. Escher⁸, K.-L. Kolho⁹, A. Paerregaard¹⁰, J. Martin de Carpi¹¹, G. Veereman Wauters¹², S. Koletzko¹³, O. Shevah³, L. Finnby¹⁴, A. Levine³, ¹Jagiellonian University Medical College, Department of Pediatrics, Gastroenterology and Nutrition, Krakow, Poland, ²Shaare Zedek Medical Center, The Hebrew University of Jerusalem, Pediatric Gastroenterology, Jerusalem, Israel, ³Wolfson Medical Center, Tel Aviv University, Pediatric Gastroenterology, Tel Aviv, Israel, ⁴Hospital, S. Joao, Department of Pediatrics, Porto, Portugal, ⁵Semmelweis University, Pediatric Gastroenterology, Budapest, Hungary, ⁶Meyer Children's Hospital, Pediatric Gastroenterology, Haifa, Israel, ⁷University of Naples “Federico II”, Pediatrics, Naples, Italy, ⁸Erasmus MC-Sophia Children's Hospital, Pediatric Gastroenterology, Rotterdam, Netherlands, ⁹Children's Hospital, Helsinki University Central Hospital, Pediatric Gastroenterology, Helsinki, Finland, ¹⁰Hvidovre Hospital, Pediatrics, Hvidovre, Denmark, ¹¹Hospital Sant Joan de Déu, Pediatric Gastroenterology, Barcelona, Spain, ¹²University Hospital UZ Brussels, Pediatric Gastroenterology, Brussels, Belgium, ¹³Dr. v Haunersches Kinderspital, Ludwig Maximilians University Munich, Pediatric Gastroenterology, Munich, Germany, ¹⁴Lovisenberg Diakonale Hospital, Unger-Vetlesens Institute, Oslo, Norway

M. Ferrante¹, M.T. Arias¹, S. Vermeire¹, M. Noman¹, G. Van Assche¹, A. Wolthuis², A. De Buck Van Overstraeten², V. Ballet¹, A. Gils³, I. Hoffman⁴, A. D'Hoore², P. Rutgeerts¹, ¹University Hospitals Leuven, Department of Gastroenterology, Leuven, Belgium, ²University Hospitals Leuven, Department of Abdominal Surgery, Leuven, Belgium, ³University Hospitals Leuven, Department of Pharmaceutical Biology, Leuven, Belgium, ⁴University Hospitals Leuven, Department of Paediatric Gastroenterology, Leuven, Belgium

B. Christensen*, S.R. Goeppinger, R. Colman, D. Siddiqui, A. Yarur, A. Hirsch, A.A. Bochenek, A. Wichmann, A. Sakuraba, R. Cohen, D.T. Rubin

University of Chicago Inflammatory Bowel Disease Center, Gastroenterology, Chicago, IL, United States

C. Muñoz Villafranca, M.T. Bravo Rodríguez, J. Ortiz de Zárate, P. Arreba González, I. García Kamiruaga, J. Heras Martín, P. Cabezudo Gil, V. Orive Cura, Hospital universitario de Basurto, Aparato digestivo, Bilbao, Spain

Y. Erzin¹, G. Sisman¹, I. Hatemi¹, B. Baca², I. Hamzaoglu³, A. Dirican⁴, A.F. Celik¹, ¹Istanbul University Cerrahpasa Medical Faculty, Gastroenterology, Istanbul, Turkey, ²Istanbul University Cerrahpasa Medical Faculty, Surgery, Istanbul, Turkey, ³Istanbul Univesrity Cerrahpasa Medical Faculty, Surgery, Istanbul, Turkey, ⁴Istanbul University Istanbul Medical faculty, Biostatistics, Turkey

S. Valério de Azevedo*, C. Maltez, A.I. Lopes

Unit of Gastrenterology, Department of Pediatrics, Santa Maria Hospital - CHLN, Academic Medical Center of Lisbon, Lisbon, Portugal

R. Muhammed, R. Bremner, W. Theodoric, S. Protheroe, S. Murphy, Birmingham Children's Hospital, Paediatric Gastroenterology, Birmingham, United Kingdom

Y. Yokoyama¹, K. Watanabe², N. Hida¹, K. Nogami¹, K. Kamikozuru¹, K. Tozawa¹, K. Nagase¹, K. Fukunaga¹, T. Matsumoto¹, ¹Hyogo College of Medicine, Department of Internal Medicine, Division of Lower Gastroenterology, Nishinomiya, Japan, ²Graduate School of Medicine, Osaka City University, Department of Gastroenterology, Osaka, Japan

A. Moniuszko*¹, A. Sarnowska², W. Rogowski³, M. Durlik^{4, 5}, G. Rydzewska^{1, 5}

¹Central Clinical Hospital of the Ministry of Internal Affairs, Department of Gastroenterology, Warsaw, Poland, ²Polish Academy of Sciences - Mossakowski Medical Research Center, Translative Platform for Regenerative Medicine, Warsaw, Poland, ³Central Clinical Hospital of the Ministry of Internal Affairs, Clinic of Urology and Oncological Urology, Warsaw, Poland, ⁴Central Clinical Hospital of the Ministry of Internal Affairs, Department of Gastroenterology and Transplant Surgery, Warsaw, Poland, ⁵Polish Academy of Sciences - Mossakowski Medical Research Center, Department of Surgical Research and Transplantology, Warsaw, Poland

A. Atanassova¹, I. Kotzev², P. Genev³, V. Velikova⁴, ¹Medical University, Gastroenterology, Varna, Bulgaria, ²Medical University Varna, Gastroenterology, Varna, Bulgaria, ³Medical University Varna, Patology, Varna, Bulgaria, ⁴University of Economics, Department of Statistics, Varna, Bulgaria