^aEmergency and Critical Care Medicine, Seirei Hamamatsu General Hospital

^bDepartment of Emergency Medicine, Tohoku University Hospital

^cDepartment of Emergency Medicine, Seirei Mikatahara General Hospital

^dSeirei Social Welfare Community, Shizuoka, Japan

Received 23 April 2021 Accepted 27 April 2021

Correspondence to Atsushi Tanikawa, MD, Emergency and Critical Care Medicine, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Naka ward, Hamamatsu city, Shizuoka 430-8558, Japan, Tel: +81 53 474 2222; fax: +81 53 471 6050; e-mail: [email protected]