Matsumoto, S
Suda, K
Iimoto, S
Yasui, K
Komatsu, M
Ushiku, C
Takahata, M
Kobayashi, Y
Tojo, Y
Fujita, K
Minami, A
Article History
Received: 23 August 2014
Revised: 4 December 2014
Accepted: 30 December 2014
First Online: 3 February 2015
Competing interests
: The authors declare no conflict of interest.