Nagasawa, Kai
Takahashi, Keiji
Matsuura, Natsumi
Takatsu, Miwa
Hattori, Takuya
Watanabe, Shogo
Harada, Eri
Niinuma, Kazumi
Murohara, Toyoaki
Nagata, Kohzo
Article History
Received: 19 March 2014
Revised: 30 July 2014
Accepted: 12 August 2014
First Online: 11 September 2014
Competing interests
: The authors declare no conflict of interest.