Text and Data Mining valid from 2020-02-10
Received: 27 October 2019
Accepted: 23 January 2020
First Online: 10 February 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This study was approved by the Animal Use and Care Committee of the Nippon Dental University School of Life Dentistry (Approval Number: 17-12) and was conducted in accordance with the committee’s guidelines.