Minagawa, Hirotaka
Onodera, Kentaro
Fujita, Hiroto
Sakamoto, Taiichi
Akitomi, Joe
Kaneko, Naoto
Shiratori, Ikuo
Kuwahara, Masayasu
Horii, Katsunori
Waga, Iwao
Article History
Received: 4 October 2016
Accepted: 12 January 2017
First Online: 3 March 2017
Competing interests
: The authors declare no competing financial interests.