Received: 5 November 2021
Accepted: 10 March 2022
First Online: 19 March 2022
: The study was conducted according to the guidelines of the Declaration of Helsinki. The study protocol was approved and the need to obtain informed consent from each subject was waived by the Medical Ethics Review Committee of Kyoto Prefectural University of Medicine (ERB-C-615-1) as this was a retrospective review of the subjects’ records according to the Ethical Guidelines for Medical and Health Research Involving Human Subjects in Japan.
: Not applicable.
: The authors declare that they have no competing interests.