Dr George Gershman, Associate Professor of Pediatrics and Chief of the Division of Pediatric Gastroenterology and Nutrition, Harbor-UCLA Medical Center, Los Angeles, USA.
Dr Marvin Ament, Professor of Pediatrics and Chief of the Division of Pediatric Gastroenterology, Hepatology and Nutrition, David Geffen School of Medicine at UCLA, Los Angeles, USA.
Mike Thomson is a Consultant Paediatric Gastroenterologist at Sheffield Children's Hospital, Sheffield, UK.