Sangu, Noriko
Shimojima, Keiko
Takahashi, Yuya
Ohashi, Tsukasa
Tohyama, Jun
Yamamoto, Toshiyuki http://orcid.org/0000-0002-9484-3505
Article History
Received: 21 June 2016
Revised: 21 October 2016
Accepted: 17 November 2016
First Online: 9 February 2017
Competing interests
: The authors declare no conflict of interest.