[1] Manchester Univ NHS Fdn Trust, Gastroenterol, Manchester, England
[2] Univ Nottingham, Nottingham NIHR Biomed Res Ctr, Univ Pk Campus, Nottingham, England
[3] London North West Healthcare NHS Trust, Harrow, England
[4] Northumbria Healthcare NHS Fdn Trust, Endoscopy, North Shields, Northumberland, England
[5] Bristol Royal Infirm & Gen Hosp, Bristol, England
[6] Bristol Royal Hosp Children, Bristol, England
[7] Nottingham Univ Hosp NHS Trust, Nottingham, England
[8] Guys & St Thomas Hosp NHS Trust, London, England
[9] Univ Hosp Birmingham NHS Trust, Gastroenterol, Birmingham, England
[10] Hull Univ Teaching Hosp NHS Trust, Kingston upon Hull, England
[11] Hull York Med Sch, Heslington, England
[12] Manchester Royal Infirm, Gastroenterol, IBD, Manchester, England
[13] Univ Nottingham, Nottingham NIHR Biomed Res Ctr, Univ Pk Campus, Nottingham NG7 2RD, England