[1] Univ Birmingham, Inst Immunol & Immunotherapy, Gastroenterol, Birmingham, W Midlands, England
[2] Radboudumc, Gastroenterol, Nijmegen, Netherlands
[3] Univ Hosp Coventry & Warwickshire, Gastroenterol, Coventry, W Midlands, England
[4] Royal Wolverhampton NHS Trust, Gastroenterol, Wolverhampton, England
[5] Dudley Grp NHS Fdn Trust, Gastroenterol, Dudley, England
[6] Univ Hosp Leicester NHS Trust, Gastroenterol, Leicester, Leics, England
[7] Univ Birmiingham, Inst Translat Med, Inst Immunol & Immunotherapy, NIHR Biomed Res Ctr, Birmingham, W Midlands, England
[8] Queen Elizabeth Hosp Birmingham, Gastroenterol, Birmingham, W Midlands, England
[9] NIHR Birmingham Biomed Res Ctr, Inst Translat Med, Inst Immunol & Immunotherapy, Birmingham, W Midlands, England