title: Retraction of an interpretation.
authors.affiliation: Centre for Paediatric Gastronenterology, Royal Free and University College Medical School, Royal Free Campus, London NW3 2PF, UK. s.murch@rfc.ucl.ac.uk
authors.forename: Simon H
authors.initials: SH
authors.lastname: Murch
authors.forename: Andrew
authors.initials: A
authors.lastname: Anthony
authors.forename: David H
authors.initials: DH
authors.lastname: Casson
authors.forename: Mohsin
authors.initials: M
authors.lastname: Malik
authors.forename: Mark
authors.initials: M
authors.lastname: Berelowitz
authors.forename: Amar P
authors.initials: AP
authors.lastname: Dhillon
authors.forename: Michael A
authors.initials: MA
authors.lastname: Thomson
authors.forename: Alan
authors.initials: A
authors.lastname: Valentine
authors.forename: Susan E
authors.initials: SE
authors.lastname: Davies
authors.forename: John A
authors.initials: JA
authors.lastname: Walker-Smith