Yabe, M
Morimoto, T
Shimizu, T
Koike, T
Takakura, H
Ohtsubo, K
Fukumura, A
Kato, S
Yabe, H
Article History
Received: 2 October 2013
Revised: 28 February 2014
Accepted: 28 February 2014
First Online: 28 April 2014
Competing interests
: The authors declare no conflict of interest.