Asano, Kenichi
Takahashi, Naomichi
Ushiki, Mikiko
Monya, Misa
Aihara, Fumiaki
Kuboki, Erika
Moriyama, Shigetaka
Iida, Mayumi
Kitamura, Hiroshi
Qiu, Chun-Hong
Watanabe, Takashi
Tanaka, Masato
Article History
Received: 3 February 2015
Accepted: 12 June 2015
First Online: 21 July 2015
Competing interests
: The authors declare no competing financial interests.