Received: 8 June 2021
Accepted: 6 October 2021
First Online: 18 October 2021
: Not Applicable.
: Informed consent was obtained from the families of all subjects. This study was approved by the ethics committee of the Niigata University of Health and Welfare, Niigata, Japan. All the methods were carried out in accordance with relevant guidelines and regulations.
: The authors declare that they have no competing interests.