Minato, Nami
Himeno, Misako
Hoshi, Ayaka
Maejima, Kensaku
Komatsu, Ken
Takebayashi, Yumiko
Kasahara, Hiroyuki
Yusa, Akira
Yamaji, Yasuyuki
Oshima, Kenro
Kamiya, Yuji
Namba, Shigetou
Article History
Received: 16 September 2014
Accepted: 17 November 2014
First Online: 10 December 2014
Competing interests
: The authors declare no competing financial interests.