Kitago, Yu
Nagae, Masamichi
Nakata, Zenzaburo
Yagi-Utsumi, Maho
Takagi-Niidome, Shizuka
Mihara, Emiko
Nogi, Terukazu
Kato, Koichi
Takagi, Junichi
Article History
Received: 1 June 2014
Accepted: 15 December 2014
First Online: 2 February 2015
Competing interests
: The authors declare no competing financial interests.