Tochio, Naoya
Umehara, Kohei
Uewaki, Jun-ichi
Flechsig, Holger
Kondo, Masaharu
Dewa, Takehisa
Sakuma, Tetsushi
Yamamoto, Takashi
Saitoh, Takashi
Togashi, Yuichi
Tate, Shin-ichi
Article History
Received: 9 June 2016
Accepted: 2 November 2016
First Online: 24 November 2016
Competing interests
: The authors declare no competing financial interests.