Takeuchi, H
Taki, Y
Hashizume, H
Asano, K
Asano, M
Sassa, Y
Yokota, S
Kotozaki, Y
Nouchi, R
Kawashima, R
Article History
Received: 19 March 2015
Revised: 8 October 2015
Accepted: 21 October 2015
First Online: 5 January 2016
Competing interests
: The authors declare no conflict of interest.