Sakamoto, Tatsuya
Ogawa, Satoshi
Nishiyama, Yudai
Akada, Chiaki
Takahashi, Hideya
Watanabe, Taro
Minakata, Hiroyuki
Sakamoto, Hirotaka
Article History
Received: 19 March 2015
Accepted: 28 August 2015
First Online: 25 September 2015
Competing interests
: The authors declare no competing financial interests.