Sakamoto, Ryota
Hoshiko, Ken
Liu, Qian
Yagi, Toshiki
Nagayama, Tatsuhiro
Kusaka, Shinpei
Tsuchiya, Mizuho
Kitagawa, Yasutaka
Wong, Wai-Yeung
Nishihara, Hiroshi
Article History
Received: 22 August 2014
Accepted: 18 February 2015
First Online: 2 April 2015
Competing interests
: The authors declare no competing financial interests.