Catharine M Walsh Editor & Author

Catharine M. Walsh, MD, MEd, PhD, FRCPC is an Associate Professor of Paediatrics at The Hospital for Sick Children, University of Toronto, Toronto, Canada.

Ahmir Ahmad, BSc, MRCP, PhD is a Senior Research Fellow at St. Mark’s Hospital, London, UK.

Jonathan Cohen, MD, FASGE, FACG is Clinical Professor of Medicine at the NYU Grossman School of Medicine, New York, USA.

Brian P. Saunders, MD, FRCP, FRCS is Consultant Gastroenterologist at St. Mark’s Hospital and Professor of Endoscopy at Imperial College, London, UK.

Peter B. Cotton, MD, FRCP, FRCS was Professor of Medicine and Director of the Digestive Disease Center, Medical University of South Carolina, Charleston, USA.

Christopher B. Williams, BM, FRCP, FRCS was Consultant Physician in Gastrointestinal Endoscopy at St. Mark’s Hospital, London, UK.