Received: 13 July 2020
Accepted: 30 September 2021
First Online: 6 October 2021
: This research was conducted in accordance with the Helsinki Declaration of 1964 and subsequent ethical standards, with the approval of Tokyo Dental College Ethics Committee (World Medical 2013).
: All participants consented to publish their information details.
: Taichi Ito, Gentaro Mori, Yukari Oda, Tomoki Hirano, Hodaka Sasaki, Shinya Honma, Yoshitaka Furuya and Yasutomo Yajima declare that they have no competing interests.