Tansriratanawong, Kallapat
Tabei, Isao
Ishikawa, Hiroshi
Ohyama, Akihiro
Toyomura, Junko
Sato, Soh
Article History
Received: 20 December 2019
Accepted: 14 May 2020
First Online: 3 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The human study was approved by the Ethics Committee of Nippon Dental University (NDU-T2011-32). All subjects provided written informed consent for participation in the study, in accordance with the Declaration of Helsinki.