[1] GASTROENTEROL UNIT, WIGAN, ENGLAND
[2] GASTROENTEROL UNIT, DUBLIN, IRELAND
[3] GASTROENTEROL UNIT, GLOUCESTER, ENGLAND
[4] GASTROENTEROL UNIT, BRISTOL, ENGLAND
[5] GASTROENTEROL UNIT, PRESTON, ENGLAND
[6] GASTROENTEROL UNIT, ROCHDALE, ENGLAND
[7] GASTROENTEROL UNIT, SALFORD, ENGLAND
[8] GASTROENTEROL UNIT, DULWICH, ENGLAND
[9] ASTRA PHARMACEUT LTD, LONDON, ENGLAND