Sugimoto, H
Nakamura, M
Yoda, H
Hiraoka, K
Shinohara, K
Sang, M
Fujiwara, K
Shimozato, O
Nagase, H
Ozaki, T
Article History
Received: 15 June 2015
Accepted: 16 June 2015
First Online: 10 August 2015
Competing interests
: The authors declare no conflict of interest.