Hayashi, Keiichiro
Michiue, Hiroyuki
Yamada, Hiroshi
Takata, Katsuyoshi
Nakayama, Hiroki
Wei, Fan-Yan
Fujimura, Atsushi
Tazawa, Hiroshi
Asai, Akira
Ogo, Naohisa
Miyachi, Hiroyuki
Nishiki, Tei-ichi
Tomizawa, Kazuhito
Takei, Kohji
Matsui, Hideki
Article History
Received: 8 July 2015
Accepted: 2 March 2016
First Online: 18 March 2016
Competing interests
: The authors declare no competing financial interests.