Nakagawa, Akira
Matsuzaki, Chiaki
Matsumura, Eitaro
Koyanagi, Takashi
Katayama, Takane
Yamamoto, Kenji
Sato, Fumihiko
Kumagai, Hidehiko
Minami, Hiromichi
Article History
Received: 2 July 2014
Accepted: 29 September 2014
First Online: 21 October 2014
Competing interests
: The authors declare no competing financial interests.