Takano, K
Fuji, S
Uchida, N
Ogawa, H
Ohashi, K
Eto, T
Sakamaki, H
Morishima, Y
Kato, K
Suzuki, R
Fukuda, T
Article History
Received: 10 September 2014
Revised: 1 December 2014
Accepted: 4 December 2014
First Online: 26 January 2015
Competing interests
: The authors declare no conflict of interest.