¹University Hospital Santiago, Department of Pharmacy, Santiago, Spain, ²USC Student, Santiago, Spain, ³University Hospital Santiago de Compostela, Gastroenterology, Santiago, Spain

¹University of Florence, Florence, Italy, ²Division of Gastroenterology, AOU Careggi Hospital, Florence, Italy, ³Digestive Surgery Unit, Careggi University Hospital, Florence, Italy

¹Kyungpook National University Hospital, Daegu, South Korea, ²Samsung Medical Center, Seoul, South Korea

¹University of Aberdeen, School of Medicine and Dentistry, Aberdeen, UK, ²Glasgow Royal Hospital for Sick Children, Department of Paediatric Gastroenterology, Hepatology and Nutrition, Glasgow, UK, ³St Mark's Hospital, Department of IBD, London, UK, ⁴University of New South Wales, Department of Gastroenterology, Sydney, Australia

Evangelismos Hospital, Gastroenterology Department, Athens, Greece ¹University Hospitals Leuven, KU Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ²Haut-Lévêque Hospital, CHU de Bordeaux, Department of Hepatogastroenterology and Digestive Oncology, Bordeaux, France, ³Haut-Lévêque Hospital, CHU de Bordeaux, Department of Abdominal Surgery, Bordeaux, France

¹Kyungpook National University Hospital, Daegu, South Korea, ²Samsung Medical Centre, Seoul, South Korea

¹Hospital Universitari Germans Trias i Pujol, Gastroenterology, Badalona - Barcelona, Spain, ²Hospital Universitari Germans Trias i Pujol, Department of Gastroenterology, Badalona - Barcelona, Spain, ³CIBEREHD, Madrid, Spain, ⁴Hospital Universitario de La Princesa, Gastroenterology, Madrid, Spain, ⁵Hospital Universitari Clínic, Gastroenterology, Barcelona, Spain, ⁶Hospital Rio Hortegea, Gastroenterology, Valladolid, Spain, ⁷Hospital Universitario de Fuenlabrada, Gastroenterology, Fuenlabrada, Spain, ⁸Hospital Politècnic La Fe, Gastroenterology, Valencia, Spain, ⁹Hospital Reina Sofía, Cordoba, Spain, ¹⁰Hospital santa Creu i Sant Pau, Gastroenterology, Barcelona, Spain, ¹¹Hospital Universitario Fundación Alcorcón, Gastroenterology, Alcorcón, Spain, ¹²Hospital Universitario de Canarias, Gastroenterology, La Laguna, Spain, ¹³Hospital Central de Asturias, Gastroenterology, Oviedo, Spain, ¹⁴Hospital Universitario Marqués de Valdecilla, Gastroenterology, Santander, Spain, ¹⁵Hospital Parc Taulí, Gastroenterology, Sabadell, Spain, ¹⁶Hospital Clínico Universitario de Valencia, Gastroenterology, Valencia, Spain, ¹⁷Hospital Clínico San Carlos, Gastroenterology, Madrid, Spain, ¹⁸Hospital de Manises, Gastroenterology, Valencia, Spain, ¹⁹Hospital Universitario de Salamanca, Gastroenterology, Salamanca, Spain, ²⁰Hospital de Sant Joan Despí Moisès Broggi, Gastroenterology, Sant Joan Despí, Spain, ²¹Hospital Universitario Araba, Gastroenterology, Vitoria, Spain, ²²Hospital Clínico Universitario, Gastroenterology, Valladolid, Spain, ²³Hospital General de Castellón, Gastroenterology, Castellón, Spain, ²⁴Hospital Universitario Ramón y Cajal, Gastroenterology, Madrid, Spain

¹CHU Kremlin-Bicêtre, Kremlin Bicêtre, France, ²CHU Henri Mondor, Creteil, France

¹St Michael’s Hospital, Department of Surgery, Bratislava, Slovakia, ²St Michael’s Hospital, Department of Gastroenterology, Bratislava, Slovakia

¹Hospital Universitario de La Princesa, Gastroenterology Unit, Madrid, Spain, ²Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain, ³Universidad Autónoma de Madrid, Madrid, Spain, ⁴Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain, ⁵Hospital Clínico y Provincial de Barcelona, Gastroenterology Unit, Barcelona, Spain, ⁶Hospital Universitario y Politécnico de La Fe, Gastroenterology Unit, Valencia, Spain, ⁷Hospital Universitario Ramón y Cajal, Gastroenterology Unit, Madrid, Spain, ⁸Hospital Universitario Puerta de Hierro, Gastroenterology Unit, Madrid, Spain, ⁹Hospital Universitario De Salamanca, Gastroenterology Unit, Salamanca, Spain, ¹⁰Hospital Universitario de Gerona Dr Josep Trueta, Gastroenterology Unit, Gerona, Spain, ¹¹Hospital Universitario Central de Asturias, Gastroenterology Unit, Oviedo, Spain, ¹²Hospital Clínico Universitario de Valencia, Gastroenterology Unit, Valencia, Spain, ¹³Complejo Hospitalario Universitario de Vigo, Gastroenterology Unit, Vigo, Spain, ¹⁴Hospital de La Santa Creu i Sant Pau, Gastroenterology Unit, Barcelona, Spain, ¹⁵Hospital Universitario de Marqués de Valdecilla, Gastroenterology Unit, Santander, Spain, ¹⁶Hospital Universitario Germans Trias i Pujol, Gastroenterology Unit, Badalona, Spain, ¹⁷Hospital Clínico Universitario de Valladolid, Gastroenterology Unit, Valladolid, Spain, ¹⁸Hospital General Universitario de Elche, Gastroenterology Unit, Elche, Spain, ¹⁹Hospital Universitario de Bellvitge, Gastroenterology Unit, Hospitalet de Llobregat, Spain, ²⁰Hospital de Galdakao-Usansolo, Gastroenterology Unit, Vizcaya, Spain, ²¹Hospital General Universitario de Alicante, Gastroenterology Unit, Alicante, Spain, ²²Hospital Universitario de Burgos, Gastroenterology Unit, Burgos, Spain, ²³Hospital Universitario Fundación Alcorcón, Gastroenterology Unit, Alcorcón, Spain, ²⁴Consorci Sanitari Terrassa, Gastroenterology Unit, Tarrasa, Spain, ²⁵Hospital Universitario de Fuenlabrada, Gastroenterology Unit, Fuenlabrada, Spain, ²⁶Complejo Hospitalario la Mancha Centro, Gastroenterology Unit, Alcázar de San Juan, Spain, ²⁷Hospital de Sant Joan Despí Moisès Broggi, Gastroenterology Unit, Sant Joan Despí, Spain, ²⁸Hospital Universitario Arnau de Vilanova, Gastroenterology Unit, Lérida, Spain, ²⁹Hospital Universitario Rio Hortega, Gastroenterology Unit, Valladolid, Spain, ³⁰Consorcio Corporación Sanitaria Parc Taulí, Gastroenterology Unit, Sabadell, Spain, ³¹Hospital Virgen de La Victoria, Gastroenterology Unit, Málaga, Spain, ³²Hospital Universitario Miguel Servet, Gastroenterology Unit, Zaragoza, Spain, ³³Hospital General Universitario de Ciudad Real, Gastroenterology Unit, Ciudad Real, Spain, ³⁴Hospital General Universitario de Castellón, Gastroenterology Unit, Castellón, Spain, ³⁵Complejo Hospitalario de Palencia, Gastroenterology Unit, Palencia, Spain, ³⁶Hospital Público General de Tomelloso, Gastroenterology Unit, Tomelloso, Spain, ³⁷Hospital Universitario Infanta Sofía, Gastroenterology Unit, San Sebastián de los Reyes, Spain, ³⁸Hospital Universitario de Torrejón, Gastroenterology Unit, Torrejón de Ardoz, Spain, ³⁹Hospital General de Segovia, Gastroenterology Unit, Segovia, Spain

¹McGill University, Department of Medicine, Montreal, Canada, ²McGill University, Division of Gastroenterology – Department of Medicine, Montreal, Canada, ³Princess Alexandra Hospital, Division of Gastroenterology and Hepatology, Brisbane, Australia, ⁴McGill University, Division of Gastroenterology – Department of Paediatrics, Montreal, Canada

¹VHsquared Ltd., Cambridge, UK, ²QMUL, Blizard Institute, London, UK, ³Royal London Hospital Bart’s Health NHS Trust, London, UK, ⁴Guys and St Thomas' Hospital, London, UK

¹University Hospital Tübingen, Internal Medicine I, Tübingen, Germany, ²Novozymes, Bagsvaerd, Denmark, ³Defensin Therapeutics, Copenhagen, Denmark

¹Aristotle University, Clinical Research and Evidence-Based Medicine Unit, Second Medical Department, Thessaloniki, Greece, ²"Papageorgiou" Hospital, 1st Department of Internal Medicine, Thessaloniki, Greece, ³Aristotle University, Second Propedeutic Medical Department, Thessaloniki, Greece, ⁴University of Oxford, Harris Manchester College, Oxford, UK

¹Merck Sharpe and Dohme, Kriens, Switzerland, ²University Hospital of Nancy, University of Lorraine, Houdemont, France, ³Merck and Co., Inc., Kenilworth, USA

¹University of Birmingham, Birmingham, UK, ²Janssen Scientific Affairs, LLC, Horsham, USA

¹Guy's and St Thomas' NHS Foundation Trust, Department of Gastroenterology, London, UK, ²Hospital Universitario Ramón y Cajal, Gastroenterología y Hepatología, Madrid, Spain

¹Hospital Universitari Germans Trias i Pujol and CIBERehd, Gastroenterology Unit, Badalona, Spain, ²Hospital Universitario La Paz, Gastroenterology Unit, Madrid, Spain, ³Servicio de Gastroenterologia, Hospital La Fe, Valencia, Spain, ⁴Hospital Universitario Reina Sofia, Unidad Clinica de Aparato Digestivo, Cordoba, Spain, ⁵Hospital General Universitario Alicante, Gastroenterology Unit, Alicante, Spain, ⁶Hospital Clinico San Carlos, Gastroenterology Unit, Madrid, Spain, ⁷MSD Spain, Medical Department, Madrid, Spain, ⁸Complejo Hospitalario Universitario de Santiago, Gastroenterology Unit, Santiago de Compostela, Spain

¹University Hospital Lausanne, Division of Gastroenterology and Hepatology, Lausanne, Switzerland, ²University Hospital Zurich, Division of Gastroenterology and Hepatology, Zurich, Switzerland, ³Helsana Group, Department of Health Sciences, Zurich, Switzerland, ⁴Triemli Hospital Zurich, Division of Surgery, Zurich, Switzerland

¹Western University, Robarts Clinical Trials, London, ON, Canada, ²Cedars-Sinai Medical Center, Inflammatory Bowel Disease Center, Division of Digestive Diseases, Los Angeles, CA, USA, ³UC San Diego School of Medicine, Division of Cardiovascular Medicine, La Jolla, CA, USA, ⁴Pfizer Inc., Collegeville, PA, USA, ⁵Medical University of Vienna, Dept Internal Medicine III, Vienna, Austria