p>
George Gershman, MD, PhD, Pediatric Gastroenterologist, Associate Professor of Pediatrics, David Geffen School of Medicine. Chief, Division of Pediatrics Gastroenterology and Nutrition, Harbour-UCLA Medical Center, Torrance, California.
Mike Thomson, MD, FRCP, Consultant Paediatric Gastroenterologist, Centre for Pediatric Gastroenterology, Sheffield Children's NHS Foundation Trust, Sheffield, UK.