Article History
Received: 28 August 2021
Accepted: 5 January 2022
First Online: 13 January 2022
Declarations
:
: We have no conflict of interest to declare.
: The study was approved by the Human Research Committee of Waseda University (approval no. 2018-268) and complied with standards set in the Declaration of Helsinki.
: All subjects provided their written consent prior to participation in the study.
: Consent was obtained to provide unidentifiable information for the purpose of publication.