¹Emergency County Hospital Saint Spiridon, Institute of Gastroenterology and Hepatology, Iasi, Romania, ²"Gr.T.Popa" University of Medicine and Pharmacy, Gastroenterology, Iasi, Romania, ³Institute of Gastroenterology and Hepatology, Gastroenterology, Iasi, Romania

¹Rabin medical center, Division of Gastroenterology, Petah Tikva, Israel, ²The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel, ³Tel Aviv Sourasky Medical Center, Department of Orthopedics, Tel Aviv, Israel, ⁴Department of Nursing, Tel Aviv University, Tel Aviv, Israel, ⁵Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel

¹Dorset County Hospital Foundation Trust, Gastroenterology, Dorchester, UK, ²Dorset County Hospital Foundation Trust, Gastroenterology, Dorchester, UK

¹Hamilton Health Sciences, Digestive Disease, Hamilton, Canada, ²Halton Healthcare, Oakville, Canada, ³QEII Health Sciences Centre, Halifax, Canada, ⁴Inomar Strategies, Oakville, Canada, ⁵Robarts Clinical Trials, London, Canada, ⁶London Health Sciences Centre, London, Canada, ⁷Red Deer Regional Hospital, Red Deer, Canada, ⁸McMaster University, Hamilton, Canada, ⁹King's College London, Waterloo, UK

Antrim Area Hospital, Gastroenterolgy, Antrim, UK

¹St. Mark's Hospital, IBD Unit, Harrow, UK, ²University College London Hospital, IBD Unit, London, UK, ³St. Mark's Hospital, IBD Unit, London, UK, ⁴Royal Free Hospital, IBD Unit, London, UK, ⁵Homerton University Hospital, Department of Gastroenterology, London, UK, ⁶Guy's and St. Thomas Hospital, IBD Unit, London, UK, ⁷King's College Hospital, IBD Unit, London, UK

University Hospital Galway, Gastroenterology, Galway, Ireland

¹Izmir Katip Celebi University, Faculty of Medicine, Internal Medicine Department, Izmir, Turkey, ²Izmir Katip Celebi University, Health Science Faculty, Nursing Department, Izmir, Turkey, ³Ege University, Faculty of Nursing, Department of Internal Medicine Nursing, Izmir, Turkey

¹Hospital de la Santa Creu i Sant Pau, Barcelona, Spain, ²Hospital Universitari Germans Trias i Pujol, Badalona, Spain, ³Centro de Investigación Biomédica en Red en el Área temática de Enfermedades Hepáticas (CIBEREHD), Barcelona, Spain

¹Oxford Brookes University, Oxford Institute of Nursing, Midwifery and Allied Health Research, Oxford, UK, ²University of Oxford, Nuffield Department of Medicine, Oxford, UK

¹Stockport Acute Foundation Trust, Gastroenterology, Stockport, UK, ²Macclesfield Hospital, Gastroenterology, Macclesfield, UK, ³Royal Blackburn Hospital, Gastroenterology, Blackburn, UK, ⁴University Hospital Of South Manchester, Gastroenterology, Manchester, UK, ⁵University Of South Manchester, Gastroenterology, Manchester, UK

St Mark's Hospital, Paediatric Gastroenterology, Harrow, UK

Gastroenterology Unit Brotzu Hospital, Cagliari, Italy

Complejo Hospitalario Universitario de Ferrol, Unidad de EICI, Servicio de Digestivo, Ferrol, Spain

King's College London, Florence Nightingale Faculty of Nursing and Midwifery, London, UK

¹King's College London, Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, London, UK, ²Trakia University, Faculty of Medicine, Stara Zagora, Bulgaria, ³Hôpital Archet2- 4èmeB- CHU de Nice, Pôle digestif- Nutrition Clinique, Nice, France, ⁴Rabin Medical Center - Beilinson Hospital, Department of Gastroenterology, Petah Tikva, Israel, ⁵Bnai Zion Medical Center, Gastroenterology Department, Haifa, Israel, ⁶Instituto Clinico Humanitas, Rozzano, Italy, ⁷Fondazione Policlinico Universitario Agostino Gemelli, Gastroenterology and Hepatology Group, Roma, Italy, ⁸Fondazione Policlinico Universitario Agostino Gemelli, Gastroenterology and Hepatology, Rome, Italy, ⁹Fondazione Policlinico Universitario Agostino Gemelli, Gastroenterology and Hepatology, Roma, Italy, ¹⁰Ostfold University College, Halden, Norway, ¹¹Hospital Clinic Barcelona, Gastroenterology, Barcelona, Spain, ¹²Hospital Ramón y Cajal, Gastroenterology, Madrid, Spain, ¹³Hospital del Mar, IBD and Digestology Department, Barcelona, Spain, ¹⁴Vall Hebron Universitary Hospita, IBD Unit Gastroenterology Department, Barcelona, Spain, ¹⁵Hospital San Juan de Dios del Aljarafe, Internal Medicine, Seville, Spain, ¹⁶Hospital Clínic de Barcelona, IBD Unit Gastroenterology Department, Barcelona, Spain, ¹⁷Stockholm Gastro Center, Stockholm, Sweden, ¹⁸Elisabeth-TweeSteden Ziekenhuis, Gastroenterology and Hepatology, Tilburg, The Netherlands, ¹⁹Az Delta Hospital, Roeselare, Belgium

¹University hospital of Linköping, Gastroenterology and hepatology, Linköping, Sweden, ²Faculty of Medicine, Linköping University, Department of Medical and Health Sciences, Linköping, Sweden, ³Department of Medical and Health Sciences, Linköping University, Department of Anaesthesiology and Intensive Care, Linköping, Sweden, ⁴Clinical and Experimental Medicine, Linköping University, Department of Gastroenterology and Department, Linköping, Sweden, ⁵Department of Medical and Health Sciences, Linköping University, Centre for Organisational support and Development, Linköping, Sweden

¹Linköping University, Department of Clinical and Experimental Medicine, Linköping, Sweden, ²Örebro University, Department of Medical Sciences, Örebro, Sweden, ³Aleris Medilab, Department of Pathology and Cytology, Täby, Sweden, ⁴Örebro University, Department of Gastroenterology, Örebro, Sweden

¹Maastricht University Medical Center, Department of Internal Medicine, Division of Gastroenterology and Hepatology, Maastricht, The Netherlands, ²Maastricht University Medical Center, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands, ³LifeGlimmer GmbH, Berlin, Germany, ⁴Wageningen University & Research, Laboratory of Systems and Synthetic Biology, Wageningen, The Netherlands, ⁵Zuyderland Medical Centre, Department of Gastroenterology and Hepatology, Sittard-Geleen/Heerlen, The Netherlands

¹Translational Research Center for GastroIntestinal Disorders (TARGID), Chronic Diseases, Metabolism and Ageing (CHROMETA), Leuven, Belgium, ²Rega Institute for Medical Research, Microbiology and Immunology, Leuven, Belgium, ³University Hospitals Leuven, Gastroenterology and Hepatology, Leuven, Belgium, ⁴Laboratory of Complex Genetics, Human Genetics, Leuven, Belgium