About the Authors

Motoki Fujita

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Validation, Visualization, Writing – original draft

motoki-ygc@umin.ac.jp

Affiliation Acute and General Medicine, Yamaguchi University Graduate School of Medicine, Ube, Japan

Masaki Todani

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Validation, Writing – review & editing

Affiliation Advanced Medical Emergency and Critical Care Center, Yamaguchi University Hospital, Ube, Japan

Kotaro Kaneda

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Validation, Writing – review & editing

Affiliation Advanced Medical Emergency and Critical Care Center, Yamaguchi University Hospital, Ube, Japan

Shinya Suzuki

Roles Data curation, Investigation, Supervision, Writing – review & editing

Affiliation Department of Emergency Medicine, Kameda Medical Center, Kamogawa, Japan

Shinjiro Wakai

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Emergency and Critical Care Medicine, Tokai University School of Medicine, Isehara, Japan

Shota Kikuta

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Emergency and Critical Care Medicine, Hyogo Emergency Medical Center, Kobe, Japan

Satomi Sasaki

Roles Data curation, Investigation, Writing – review & editing

Affiliation Advanced Medical Emergency Department and Critical Care Center, Japanese Red Cross Maebashi Hospital, Maebashi, Japan

Noriyuki Hattori

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, Chiba, Japan

Kazuyoshi Yagishita

Roles Data curation, Investigation, Writing – review & editing

Affiliation Hyperbaric Medical Center, Tokyo Medical and Dental University, Tokyo, Japan

Koji Kuwata

Roles Data curation, Investigation, Writing – review & editing

Affiliation Division of Medicine, Japan Self Defense Forces Hospital Yokosuka, Yokosuka, Japan

Ryosuke Tsuruta

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Supervision, Writing – review & editing

Affiliations Acute and General Medicine, Yamaguchi University Graduate School of Medicine, Ube, Japan, Advanced Medical Emergency and Critical Care Center, Yamaguchi University Hospital, Ube, Japan

on behalf of the COP-J Study Investigators

Details of the COP-J Study Investigators are indicated in the Acknowledgments.

Competing Interests

The authors have declared that no competing interests exist.