1. Emergency and Critical Care Medical Center; Osaka Police Hospital; Osaka Japan
2. Department of Emergency Medicine, Unit of Clinical Medicine; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki Japan
3. Emergency and Critical Care Center; Hyogo Prefectural Nishinomiya Hospital; Hyogo Japan
4. Department of Traumatology and Acute Critical Medicine; Osaka University Graduate School of Medicine; Osaka Japan
5. Department of Emergency and Critical Care Medicine; Kansai Medical University Hirakata Hospital; Osaka Japan
6. Department of Biomedical Statistics; Osaka University Graduate School of Medicine; Osaka Japan
7. Department of Emergency and Critical Care; Osaka General Medical Center; Osaka Japan