Kobayashi, Koichi
Maeda, Kengo
Takefuji, Mikito
Kikuchi, Ryosuke
Morishita, Yoshihiro
Hirashima, Masanori
Murohara, Toyoaki
Article History
Received: 9 January 2017
Accepted: 29 June 2017
First Online: 2 August 2017
Competing Interests
: The authors declare that they have no competing interests.