Yu, Xiuzhen http://orcid.org/0000-0003-3136-7289
Morikawa, Daisuke http://orcid.org/0000-0001-8110-7499
Yokouchi, Tomoyuki
Shibata, Kiyou
Kanazawa, Naoya
Kagawa, Fumitaka http://orcid.org/0000-0002-1763-6799
Arima, Taka-hisa
Tokura, Yoshinori
Article History
Received: 24 October 2017
Accepted: 24 April 2018
First Online: 28 May 2018
Competing interests
: The authors declare no competing interests.