Nomura, Yoshiaki
Kakuta, Erika
Okada, Ayako
Otsuka, Ryoko
Shimada, Mieko
Tomizawa, Yasuko
Taguchi, Chieko
Arikawa, Kazumune
Daikoku, Hideki
Sato, Tamotsu
Hanada, Nobuhiro
Article History
Received: 9 September 2019
Accepted: 13 April 2020
First Online: 21 April 2020
Ethics approval and consent to participate
: Informed written consent was obtained from all of the participants at the baseline survey visit. This study was approved by the Ethics Committee of Tsurumi University School of Dental Medicine (Approval Number: 1515).
: Not applicable.
: YN is an assignment editor for BMC Oral Health. Other than that, the authors state that they have no financial or nonfinancial conflicts of interest regarding this research.