[1] HOSP WIGAN, DEPT GASTROENTEROL, WIGAN, ENGLAND
[2] HOSP SANDWELL, DEPT GASTROENTEROL, SANDWELL, ENGLAND
[3] HOSP GLOUCESTER, DEPT GASTROENTEROL, GLOUCESTER, ENGLAND
[4] HOSP BISHOP AUCKLAND, DEPT GASTROENTEROL, BISHOP AUCKLAND, ENGLAND
[5] HOSP PAISLEY, DEPT GASTROENTEROL, PAISLEY, SCOTLAND
[6] HOSP DUBLIN, DEPT GASTROENTEROL, DUBLIN, IRELAND
[7] HOSP ORSETT, DEPT GASTROENTEROL, ORSETT, ENGLAND
[8] ASTRA PHARMACEUT LTD, KINGS LANGLEY, ENGLAND