Shinya, Kaori
Nakayama, Tomohiro
Nakayama, Takuo
Yamamoto, Tatsuo
Article History
Received: 25 July 2016
Revised: 24 March 2017
Accepted: 24 April 2017
First Online: 2 November 2017
Competing interests
: TN received 1 000 000 yen or more (in 1 year) for holding an advisory position. The remaining authors declare no conflict of interest.
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