Yokote, Hiroaki http://orcid.org/0000-0001-8620-5063
Kamata, Tomoyuki
Toru, Shuta
Sanjo, Nobuo
Yokota, Takanori
Article History
Received: 24 April 2018
Accepted: 29 June 2018
First Online: 4 July 2018
Compliance with ethical standards
: 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.
: The authors declare that they have no conflict of interest.