Kumamoto, Taisuke
Tashima, Koichiro
Hiraoka, Chieko
Ikuta, Yoshihiro
Yamamoto, Tatsuo
Article History
Received: 10 September 2020
Accepted: 29 December 2020
First Online: 11 January 2021
Ethics approval and consent to participate
: This study was approved by the institutional review board of Kumamoto University Hospital, Kumamoto. Verbal consent for participation was obtained from all recruited anesthesiologists. The institutional review board approved the procedure for obtaining verbal consent.
: Not applicable.
: The authors declare that they have no competing interests.