Tanaka, Akemi
Takahashi, Kiyoshi
Masutomi, Yuji
Hanasaki, Naota
Hijioka, Yasuaki
Shiogama, Hideo
Yamanaka, Yasuhiro
Article History
Received: 5 March 2015
Accepted: 25 August 2015
First Online: 16 September 2015
Competing interests
: The authors declare no competing financial interests.