[1] GLAXO GRP RES LTD, GASTROINTESTINAL PHARMACOL, WARE SG12 ODP, HERTS, ENGLAND
[2] ROYAL FREE HOSP, SCH MED, DEPT HISTOPATHOL, LONDON NW3 2PF, ENGLAND
[3] ROYAL FREE HOSP, SCH MED, DEPT MED, LONDON NW3 2PF, ENGLAND
[4] ROYAL FREE HOSP, SCH MED, DEPT ANAT, LONDON NW3 2PF, ENGLAND