Sakaida, Shun
Otsubo, Kazuya
Sakata, Osami
Song, Chulho
Fujiwara, Akihiko http://orcid.org/0000-0002-1319-388X
Takata, Masaki
Kitagawa, Hiroshi
Article History
Received: 12 June 2015
Accepted: 27 January 2016
First Online: 7 March 2016
Competing interests
: The authors declare no competing financial interests.