¹Edmond and Lily Safra Children's Hospital, Pediatric Gastroenterology Unit, Tel Hashomer, Israel, ²Alder Hey Children's NHS Foundation Trust, Paediatric Gastroenterology Department, Liverpool, UK, ³Schneider Children's Medical Center of Israel, Institute of Gastroenterology, Nutrition and Liver Disease, Petah Tiqwa, Israel, ⁴University of Naples, Department of Translational Medical Science, Section of Pediatrics, Naples, Italy, ⁵University of Campania "Luigi VAnvitelli", Department of Woman, Child and General Surgery, Naples, Italy, ⁶Shaare Zedak Medical Center, Juliet Keidan Institute of Pediatric Gastroenterology and Nutrition, Jerusalem, Israel, ⁷”Iuliu Hatieganu” University of Medicine and Pharmacy, Pediatric Gastroenterology, Cluj-Napoca, Romania, ⁸Children's Hospital Zagreb, Zagreb, Croatia, ⁹Hvidovre University Hospital, The Paediatric Department, Copenhagen, Denmark, ¹⁰VU University Medical Center, Department of Pediatric Gastroenterology, Amsterdam, The Netherlands, ¹¹University of Messina, Pediatric Gastroenterology, Messina, Italy, ¹²University Hospital Southampton, Department of Paediatrics, Southampton, UK, ¹³Umberto Hospital, Sapienza University of Rome, Pediatric Gastroenterology and Liver Unit, Rome, Italy, ¹⁴Bristol Royal Hospital for Children, Department of Paediatric Gastroenterology, Bristol, UK, ¹⁵Dana-Dwek Children's Hospital, Pediatric Gastroenterology Unit, Tel Aviv, Israel

¹Hospital Universitario Central de Asturias, Gastroenterology, Oviedo, Spain, ²Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain, ³Hospital Universitario Central de Asturias, Immunology, Oviedo, Spain

¹LUMC, Gastroenterology-Hepatology, Leiden, The Netherlands, ²University Hospital Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ³LUMC, Department of Pathology, Leiden, The Netherlands

¹Université Rennes 1 and CHU Pontchaillou Rennes, Service des Maladies de l'Appareil Digestif, Rennes, France, ²CHU Pontchaillou, Department of Surgery, Rennes, France, ³CHU Pontchaillou, Department of Hepatology, Rennes, France, ⁴CHU Pontchaillou, Biochemical unit, Rennes, France

¹Mahidol University, Bangkok, Thailand, ²University of Michigan, Internal Medicine - Gastroenterology, Ann Arbor, Michigan, USA, ³University of Michigan, Internal Medicine - Gastroenterology, Ann Arbor, USA, ⁴University of Michigan, Internal Medicine - Infectious Diseases, Ann Arbor, USA, ⁵University of Michigan, Internal Medicine - Gastroenterology, Ann Arbor, MI, USA

Sapienza University of Rome, Pediatric Gastroenterology and Liver unit, Department of Pediatrics, ROME, Italy

Cleveland Clinic Foundation, Colorectal Surgery, Cleveland, USA

¹Garcia de Orta Hospital, Gastrenterology, Lisbon, Portugal, ²Portuguese Institute of Oncology Francisco Gentil in Lisbon, Department of Gastroenterology, Lisbon, Portugal, ³Garcia de Orta, Garcia de Orta, Lisbon, Portugal, ⁴CUF Descobertas, Pathology, Lisbon, Portugal

School of Medicine Federico II of Naples, Department of Clinical Medicine and Surgery, Naples, Italy

¹University of Edinburgh, Edinburgh, UK, ²Edinburgh Royal Infirmary, Department of Gastroenterology, Edinburgh, UK, ³NHS Lothian - Western General Hospital, Gastrointestinal Unit, Edinburgh, UK

¹ESiOR Oy, Kuopio, Finland, ²Tampere University Hospital, Tampere, Finland, ³Jorvi Hospital, Espoo, Finland, ⁴Turku University Hospital, Turku, Finland, ⁵Janssen-Cilag AS, Oslo, Norway, ⁶Janssen-Cilag Oy, Espoo, Finland, ⁷Peijas Hospital, Vantaa, Finland

University Hospital Santiago de Compostela, Gastroenterology, Santiago, Spain

¹Hyogo College of Medicine, Intestinal Inflammation Research, Nishinomiya, Hyogo, Japan, ²Yamaguchi University Hospital, Center For Clinical Research, Yamaguchi, Japan, ³Nishishita Gastrointestinal Hospital, Osaka, Japan, ⁴Prefectural University of Hiroshima, Hiroshima, Japan, ⁵Iseikai Hospital, Osaka, Japan, ⁶Kyushu University, Fukuoka, Japan, ⁷Hiroshima University Hospital, Hiroshima, Japan, ⁸Kyoto Katsura Hospital, Kyoto, Japan, ⁹Fukuoka University Chikushi Hospital, Fukuoka, Japan, ¹⁰Osaka Medical College, Osaka, Japan, ¹¹Inoue Gastroenterology and Endoscopy Clinic, Osaka, Japan, ¹²Hyogo College of Medicine, Nishinomiya, Hyogo, Japan, ¹³Takano Hospital, Kumamoto, Japan, ¹⁴Kinki University, Osaka, Japan, ¹⁵Toho University Sakura Medical Center, Chiba, Japan, ¹⁶Fujita Health University School of Medicine, Aichi, Japan, ¹⁷Jikei University School of Medicine, Tokyo, Japan, ¹⁸The Cancer Institute Hospital Of JFCR, Tokyo, Japan, ¹⁹National Cancer Center Hospital, Tokyo, Japan, ²⁰Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan

¹La Fe University and Polytechnic Hospital, Valencia, Spain, ²CIBEREHD (Networked Biomedical Research Center for Hepatic and Digestive Diseases), Valencia, Spain, ³Health Research Institute La Fe, Valencia, Spain, ⁴University of Valencia, Valencia, Spain, ⁵Joint Research Unit in Biomedical Engineering (eRPSS: IIS La Fe-UPV), Valencia, Spain, ⁶Connected Health Services, Valencia, Spain, ⁷Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Madrid, Spain, ⁸Systems Department, La Fe University and Polytechnic Hospital, Valencia, Spain

¹Academic Medical Center (AMC), Department of Gastroenterology and Hepatology, Amsterdam, The Netherlands, ²Haukeland University Hospital, National Centre for Ultrasound in Gastroenterology, Bergen, Norway

¹Faculty of Medicine, University of Porto,, Department of Biomedicine, Unit of Pharmacology and Therapeutics, Porto, Portugal, ²Centro Hospitalar São João, Gastroenterology Department, Porto, Portugal, ³Centre for Drug Discovery and Innovative Medicines, University of Porto, Porto, Portugal, ⁴Faculty of Medicine of the University of Lisbon, Lisbon, Portugal, ⁵Instituto de Saúde Ambiental, Faculty of Medicine of Lisbon, Lisbon, Portugal, ⁶Hospital Garcia de Orta, Department of Gastroenterology, Almada, Portugal, ⁷Centro Hospitalar do Algarve, Gastroenterology Department, Portimão, Portugal, ⁸Instituto Português de Oncologia de Lisboa,, Gastroenterology Department, Lisboa, Portugal, ⁹Centro Hospitalar São Joao, Department of Gastroenterology, Porto, Portugal, ¹⁰Centro Hospitalar de Gaia, Department of Gastroenterology and Hepatology, Vila Nova de Gaia, Portugal, ¹¹Faculty of Medicine, University of Porto, Health Information and Decision Sciences Department, Porto, Portugal, ¹²Center for Health Technology and Services Research, Porto, Portugal

Erasmus Medical Center, Gastroenterology and Hepatology, Rotterdam, The Netherlands

Ümraniye Training and Research Hospital, Gastroenterology, Istanbul, Turkey

¹Hospital De Sabadell, Institut Universitari Parc Taulí, Digestive Unit, Sabadell, Spain, ²Complejo Hospitalario de Pontevedra, Gastroenterology Unit, Pontevedra, Spain, ³Unidad de Gastroenterología,Hospital General de Valencia, Valencia, Spain, ⁴Hospital Universitario Puerta de Hierro, Servicio de Gastroenterologia, Madrid, Spain, ⁵Hospital Universitari Germans Trias i Pujol and CIBERehd, Gastroenterology Unit, Badalona, Spain, ⁶Spanish Association of patients with Crohn´s disease and Ulcerative colitis, Madrid, Spain, ⁷MSD, Medical Department, Madrid, Spain, ⁸Hospital Vall d´Hebron, Gastroenterology Department, Barcelona, Spain

¹Alexandria University, Gastroenterology, Alexandria, Egypt, ²Alexandria University, Clinical Pathology, Alexandria, Egypt, ³Alexandria University, Radiodiagnosis, Alexandria, Egypt