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Contributor Information
K C Kapur, Specialist Registrar in Gastroenterology; Royal Gwent Hospital, Newport.
J T Green, Specialist Registrar in Gastroenterology; Royal Gwent Hospital, Newport.
R G Turner, Senior House Officer in Surgery; Royal Gwent Hospital, Newport.
J Swift, Consultant Gastroenterologist; Royal Gwent Hospital, Newport.
E D Srivastava, Consultant Gastroenterologist; Royal Gwent Hospital, Newport.
M C Allison, Consultant Gastroenterologist; Royal Gwent Hospital, Newport.


