Funding for this research was provided by:
Grants-in-Aid for Scientific Research (C) from the Japan Society for the Promotion of Science (23234567)
Article History
Received: 15 December 2019
Accepted: 20 July 2020
First Online: 23 July 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: The present study was reviewed and approved by The Human Research Committee of the Nippon Dental University School of Life Dentistry at Niigata (approval number: ECNG-H-9).