Hasegawa, Kazuhiro
Sakamaki, Hiroyuki
Higuchi, Masahiro
Suemitsu, Masaaki
Taguchi, Chieko
Ito, Ko
Morikawa, Miyuki
Utsunomiya, Tadahiko
Kondoh, Toshirou
Kuyama, Kayo
Article History
Received: 17 December 2017
Accepted: 5 March 2018
First Online: 12 March 2018
Compliance with ethical standards
:
: Informed consent was obtained from all individuals included in the study.
: The authors declare that they have no conflict interest.
: All procedure performed in studies involving human participants were in accordance with the ethical standards of the Committee on Studies Involving Human Beings of Nihon University School of Dentistry at Matsudo (EC-15-14-033-1) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.