Hou, Dazhi
Qiu, Zhiyong
Iguchi, R.
Sato, K.
Vehstedt, E. K.
Uchida, K.
Bauer, G. E. W.
Saitoh, E.
Article History
Received: 12 April 2016
Accepted: 16 June 2016
First Online: 26 July 2016
Competing interests
: The authors declare no competing financial interests.