1. Department of Pediatrics Okinawa Chubu Hospital Okinawa Japan
2. Division of Gastroenterology, Hepatology and Nutrition Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
3. Department of Clinical Pharmacology and Therapeutics University of the Ryukyus Okinawa Japan
4. Division of Pediatric Emergency Medicine Department of Pediatrics BC Children's Hospital Research Institute University of British Columbia Vancouver British Columbia Canada