From the *Department of Health Services Research, University of Tsukuba, Ibaraki, Japan
†Department of Anesthesiology, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
‡Department of Health Services Research, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
§Department of Otorhinolaryngology, Head and Neck Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan.
Accepted for publication April 26, 2022.
Funding: None.
The authors declare no conflicts of interest.
Address correspondence to Kensuke Shimada, MD, Department of Health Services Research, University of Tsukuba, 1-1-1 Tenno-dai, Tsukuba, Ibaraki 305-8575, Japan. Address e-mail to [email protected].
