1. Emergency and Critical Care Center Kyushu University Hospital Fukuoka Japan
2. Department of Pediatrics Graduate School of Medical Sciences Kyushu University Fukuoka Japan
3. Department of Emergency Medicine Osaka Medical College Osaka Japan
4. Department of Pediatrics Osaka Medical College Osaka Japan
5. Department of Emergency Medicine School of Medicine Yokohama City University Yokohama Japan
6. Advanced Emergency and Critical Care Medical Center Okayama University Hospital Okayama Japan
7. Department of Pediatrics Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan
8. Department of Emergency and Critical Care Medicine University of Tsukuba Hospital Tsukuba Japan