Zhang, Rui
Murata, Michihisa
Aharen, Tomoko
Wakamiya, Atsushi
Shimoaka, Takafumi
Hasegawa, Takeshi
Murata, Yasujiro
Article History
Received: 4 September 2015
Accepted: 20 January 2016
First Online: 7 March 2016
Competing interests
: The authors declare no competing financial interests.