[1] Royal Sussex Cty Hosp, Ctr Digest Dis, Brighton Univ Hosp, Brighton BN2 5BE, E Sussex, England
[2] Royal Sussex Cty Hosp, Sussex Univ Hosp, Brighton BN2 5BE, E Sussex, England
[3] Univ Nottingham Hosp, Dept GI Surg, Nottingham NG7 2UH, England
[4] Ninewells Hosp, Dept Surg, Dundee DD1 9SY, Scotland
[5] Univ Edinburgh, Western Gen Hosp, Acad Coloproctol, Edinburgh, Midlothian, Scotland
[6] Imperial Coll, St Marks Hosp, Harrow, Middx, England
[7] St Marys Hosp, Acad Unit Med Genet & Natl Genet, Reference Lab, Manchester M13 0JH, Lancs, England
[8] Univ Hosp N Tees, Stockton On Tees, Cleveland, England
[9] Walsgrave Gen Hosp, Coventry CV2 2DY, W Midlands, England
[10] Univ London Imperial Coll Sci Technol & Med, London, England
[11] St Marks Hosp, Wolfson Unit Endoscopy, Harrow, Middx, England
[12] Univ Southampton, Southampton, Hants, England
[13] Princess Anne Hosp, Wessex Clin Genet Serv, Southampton, Hants, England
[14] St Bartholomews Hosp, Dept Endocrinol, London, England
[15] St Bartholomews Hosp, Dept Gastroenterol, London, England
[16] UCL, Royal Marsden Hosp, London, England