Kriener, M.
Nakajima, T.
Kaneko, Y.
Kikkawa, A.
Yu, X. Z.
Endo, N.
Kato, K.
Takata, M.
Arima, T.
Tokura, Y.
Taguchi, Y.
Article History
Received: 25 January 2016
Accepted: 22 April 2016
First Online: 10 May 2016
Competing interests
: The authors declare no competing financial interests.