Tanaka, Y
Manabe, A
Fukushima, H
Suzuki, R
Nakadate, H
Kondoh, K
Nakamura, K
Koh, K
Fukushima, T
Tsuchida, M
Koike, K
Kiyokawa, N
Noguchi, E
Sumazaki, R
Komiyama, T
Article History
Received: 27 June 2014
Revised: 22 September 2014
Accepted: 7 October 2014
First Online: 18 November 2014
Competing interests
: The authors declare no conflict of interest.