Yamauchi, Takenori
Takeuchi, Shouhei
Horii, Yoichiro
Yamano, Yuko
Kuroda, Yoshiki
Nakadate, Toshio
Article History
Received: 12 August 2015
Accepted: 8 February 2016
First Online: 31 March 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For this type of study, formal consent is not required.
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