Katayama, Shinshu
Tonai, Ken
Shima, Jun
Koyama, Kansuke
Nunomiya, Shin
Article History
Received: 26 January 2020
Accepted: 15 April 2020
First Online: 25 April 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Research Ethics Committee of the Jichi Medical University Hospital (A19–045). Informed consent was waived due to the retrospective nature of the study.
: Not applicable.
: SK has a contract of consultation with Hamilton Medical. A Hamilton G5 ventilator was lent out from Nihon Kohden.