Arai, Shintaro
Mizutani, Tohru
Sugiyama, Tatsuya
Sumi, Kenji
Nakajo, Takato
Matsumoto, Masaki
Shimizu, Katsutoshi
Article History
Received: 4 October 2018
Accepted: 26 November 2018
First Online: 4 December 2018
Compliance with ethical standards
:
: The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this paper.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.
: None.