Fujimori, Hiroaki
Sato, Akira
Kikuhara, Sota
Wang, Junhui
Hirai, Takahisa
Sasaki, Yuka
Murakami, Yasufumi
Okayasu, Ryuichi
Masutani, Mitsuko
Article History
Received: 14 August 2015
Accepted: 29 October 2015
First Online: 15 December 2015
Competing interests
: The authors declare no competing financial interests.