Article History
Received: 15 March 2021
Accepted: 7 June 2021
First Online: 15 June 2021
Declarations
:
: The authors have declared that no conflict of interest exists.
: All the procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee at which the studies were conducted (Shinshu University Ethics Committee; IRB approval number 3320) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Written informed consent was obtained from all individual participants included in the study.