Hirashima, Chikako
Ohkuchi, Akihide
Nagayama, Shiho
Suzuki, Hirotada
Takahashi, Kayo
Ogoyama, Manabu
Takahashi, Hironori
Shirasuna, Koumei
Matsubara, Shigeki
Article History
Received: 12 October 2016
Revised: 10 April 2017
Accepted: 7 May 2017
First Online: 5 October 2017
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.