¹Department of Gastroenterology, University Hospital CHU of Liège, Liege, Belgium, ²Department of Gastroenterology, Saint Pierre University Hospital, Brussels, Belgium, ³Department of Gastroenterology, Imelda ziekenhuis, Bonheiden, Belgium, ⁴Department of Gastroenterology, Hospital CHC, Liège, Belgium, ⁵Department of Gastroenterology, CHwapi Notre Dame, Tournai, Belgium, ⁶Department of Gastroenterology, Maria Middelares Medical Centre, Ghent, Belgium, ⁷Department of Gastroenterology, UZ Brussel- Vrije Universiteit Brussel, Brussels, Belgium, ⁸Department of Gastroenterology, Ziekenhuis Oost Limburg, Genk, Belgium, ⁹Department of Gastroenterology, Onze Lieve Vrouwziekenhuis, Aalst, Belgium, ¹⁰Department of Gastroenterology, University Hospitals Leuven, Leuven, Belgium, ¹¹Department of Gastroenterology, AZ Groeninge Hospital, Kortrijk, Belgium, ¹²Department of Gastroenterology, AZ St Lucas,Gent, Belgium, ¹³Department of Gastroenterology, Hopital Universitaire Erasme, Brussels, Belgium, ¹⁴Department of Gastroenterology, Clinique St Pierre, Ottignies, Belgium, ¹⁵Department of Gastroenterology, CHU UCL Namur site Sainte Elisabeth, Brussels, Belgium, ¹⁶Department of Gastroenterology, AZ Delta, Roeselare, Belgium, ¹⁷Department of Gastroenterology, Hospital CHR de la Citadelle, Liège, Belgium, ¹⁸Department of Gastroenterology, Jessa Ziekenhuis- Hasselt, Hasselt, Belgium, ¹⁹Department of Gastroenterology, CHU Ambroise Paré, Mons, Belgium, ²⁰Department of Medical Affairs, Takeda Pharmaceuticals, Brussels, Belgium, ²¹Department of Epidemiology, Takeda Pharmaceuticals, London, UK

¹Brighton and Sussex University Hospitals, IBD Team- Gastroenterology, Brighton, UK, ²University of Brighton, Pharmacy, Brighton, UK

¹University of Rome Sapienza, Department of Gastroenterology, Department of Internal Medicine and Medical Specialties, Rome, Italy, ²Sandro Pertini Hospital, Unit of Gastroenterology and Digestive Endoscopy, Rome, Italy, ³‘Cristo Re’ Hospital, Internal Medicine, Internal Medicine, Italy

¹Department of Gastroenterology, Gold Coast University Hospital, Southport, Australia, ²Department of Nutrition and Food Services, Gold Coast University Hospital, Southport, Australia

¹Takeda Pharmaceuticals U.S.A.- Inc., Gastroenterology, Deerfield, USA, ²Pharmerit International, Gastroenterology, Bethesda, USA, ³Takeda Pharmaceuticals U.S.A.- Inc.., Gastroenterology, Lake Zurich, USA

Amiens university hospital, Gastroenterology, Amiens, France

¹Tel Aviv Sourasky medical center, Internal medicine I, Tel Aviv, Israel, ²Tel Aviv Sourasky medical center, Department of Dermatology, Tel Aviv, Israel, ³Tel Aviv Sourasky medical center, Department of Gastroenterology and Liver diseases, Tel Aviv, Israel, ⁴Sanz Medical Center Laniado Hospital, Department of Gastroenterology, Netanya, Israel

Russells Hall Hospital, Gastroenterology, Dudley, UK

¹St James’ University Hospital, Gastroenterology, Leeds, UK, ²St James’ University Hospital, Obstetrics, Leeds, UK

¹Department of Gastroenterology, Northern Care Alliance, Manchester, UK, ²Division of Diabetes- Endocrinology and Gastroenterology, University of Manchester, Manchester, UK

¹Department of Surgical Sciences, University of Turin, Turin, Italy, ²First Department of Internal Medicine, IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy, ³Unit of Gastroenterology, Molinette Hospital, Turin, Italy, ⁴Department of Medical Sciences, University of Turin, Turin, Italy

¹Proctological and Pelvic Floor Clinical Centre, University Hospital of Pisa, Pisa, Italy, ²Inflammatory Bowel Disease Surgical Unit, University Hospital of Pisa, Pisa, Italy

Policlinico Sant’Orsola-Malpighi, Malattie Infiammatorie Croniche Intestinali Prof. Gionchetti, Bologna, Italy

¹University Hospital Southampton NHS Foundation Trust, Department of Gastroenterology, Southampton, UK, ²Biogen International GmbH, n/a, Baar, Switzerland, ³University of Stellenbosch, Department of Statistics and Actuarial Science, Stellenbosch, South Africa, ⁴Biogen Idec, n/a, Maidenhead, UK, ⁵University of Southampton, School of Health Sciences, Southampton, UK

Department of IBD, Moscow Scientific Center named after A. S. Loginov, Moscow, Russian Federation

¹Beaumont Hospital, Department of Gastroenterology, Dublin, Ireland, ²Beaumont Hospital, Department of Colorectal Surgery, Dublin, Ireland

¹Hokkaido University Hospital, Department of Gastroenterology, Sapporo City- Hokkaido, Japan, ²Sapporo Higashi Tokushukai Hospital, Inflammatory Bowel Disease Center, Sapporo City- Hokkaido, Japan

¹AOU Careggi, IBD Referral Center- Gastroenterology Unit, Firenze, Italy, ²Università Degli Studi di Firenze, Department of Experimental and Clinical Biomedical Sciences ‘Mario Serio’, Firenze, Italy, ³Institute for Cancer Research- Prevention and Clinical Network ISPRO, Molecular and Nutritional Epidemiology Unit, Firenze, Italy

¹Analysis Group Inc., Health Economics and Outcomes Research, Boston, USA, ²H. E. Outcomes, Health Economics and Outcomes Research, Los Angeles, USA, ³Icahn School of Medicine at Mount Sinai, Dr Henry D. Janowitz Division of Gastroenterology, New York, USA, ⁴Shire- a Takeda company, Health Economics- Outcomes Research and Epidemiology, Lexington, USA

Rostov State Medical University, Department of Gastroenterology, Rostov-on-Don, Russian Federation