1. Department of Emergency and Critical Care Medicine Jichi Medical University Saitama Medical Center Saitama Japan
2. Department of Clinical Research Education and Training Unit Keio University Hospital Clinical and Translational Research Center (CTR) Tokyo Japan
3. Department of Intensive Care Medicine Kameda Medical Center Chiba Japan
4. Department of Intensive Care Medicine Chiba Emergency Medical Center Chiba‐shi Japan
5. Department of Medical Engineer Kameda Medical Center Chiba Japan
6. Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
7. Division of Clinical Laboratory and Infection Control Yamagata University Hospital Yamagata Japan