Shirahata, Tatsuya
Ino, Chieko
Mizuno, Fumi
Asada, Yoshihisa
Hirotani, Masao
Petersson, George A
Ōmura, Satoshi
Yoshikawa, Takafumi
Kobayashi, Yoshinori
Article History
Received: 8 November 2016
Revised: 3 February 2017
Accepted: 6 February 2017
First Online: 22 March 2017
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.