Namba, Kosuke
Takeuchi, Kohei
Kaihara, Yukari
Oda, Masataka
Nakayama, Akira
Nakayama, Atsushi
Yoshida, Masahiro
Tanino, Keiji
Article History
Received: 23 June 2015
Accepted: 25 September 2015
First Online: 4 November 2015
Competing interests
: The authors declare no competing financial interests.