Miyashita, Shin-Ichiro
Sagane, Yoshimasa
Suzuki, Tomonori
Matsumoto, Takashi
Niwa, Koichi
Watanabe, Toshihiro
Article History
Received: 18 April 2016
Accepted: 12 July 2016
First Online: 10 August 2016
Competing interests
: The authors declare no competing financial interests.