Article History
Received: 4 March 2020
Accepted: 12 August 2020
First Online: 20 August 2020
Ethics approval and consent to participate
: The present study was approved by ethical committee of The Nippon Dental University, and the present study does not contain any studies with human participants or animal performed by any of the authors.
: Not applicable.
: The author reports no conflicts of interest related to the present study.