Ujihira, T.
Ikeda, K.
Suzuki, T.
Yamaga, R.
Sato, W.
Horie-Inoue, K.
Shigekawa, T.
Osaki, A.
Saeki, T.
Okamoto, K.
Takeda, S.
Inoue, S.
Article History
Received: 4 September 2014
Accepted: 3 December 2014
First Online: 6 January 2015
Competing interests
: The authors declare no competing financial interests.