Sunakawa, Yusuke
Tsugayasu, Hideki
Watanabe, Yutaka https://orcid.org/0000-0002-4983-2399
Matsushita, Takae
Ohara, Yuki
Iwasaki, Masanori
Shirobe, Maki
Ito, Kayoko
Nakajima, Junko
Iwasa, Yasuyuki
Itoda, Masataka
Sasaki, Rikimaru
Nishi, Yasuhiro
Furuya, Junichi
Watanabe, Yoshihiko
Ishiguro, Yukie
Hirano, Hirohiko
Sato, Yuji
Yoshida, Mitsuyoshi
Yamazaki, Yutaka
Article History
Received: 4 July 2021
Accepted: 18 October 2021
First Online: 28 October 2021
Declarations
:
: The authors have no conflict of interest to declare that are relevant to this article.
: This study was reviewed and approved by the ethics committee of the Japanese Society of Gerodontology (2018-1, 2019-3) and the Clinical and Epidemiological Research Ethics Committee of the Faculty of Dental Medicine at Hokkaido University (2020-4). It was conducted in accordance with the ethical principles of the Declaration of Helsinki.
: Informed consent was obtained from all individual participants and their families included in the study.