Katasho, Yumi
Liang, Yunfeng
Murata, Sumihiko
Fukunaka, Yasuhiro
Matsuoka, Toshifumi
Takahashi, Satoru
Article History
Received: 27 March 2015
Accepted: 5 August 2015
First Online: 4 September 2015
Competing interests
: The authors declare no competing financial interests.