1. Department of Internal Medicine Okayama Saiseikai General Hospital Okayama Japan
2. Department of Cardiovascular Medicine, Faculty of Medicine Dentistry and Pharmaceutical Sciences, Okayama University Okayama Japan
3. Department of Orthopedic surgery Okayama Saiseikai General Hospital Okayama Japan
4. Department of Emergency medicine Okayama Saiseikai General Hospital Okayama Japan
5. Department of Emergency, Critical Care, and Disaster Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan