Yamazaki, Tomoo
Joshita, Satoru
Umemura, Takeji
Usami, Yoko
Sugiura, Ayumi
Fujimori, Naoyuki
Shibata, Soichiro
Ichikawa, Yuki
Komatsu, Michiharu
Matsumoto, Akihiro
Igarashi, Koji
Tanaka, Eiji
Article History
Received: 17 November 2016
Accepted: 24 March 2017
First Online: 20 April 2017
Competing interests
: Kouji Igarashi is an employee of TOSOH Corporation. The other authors declare that they have no conflicts of interest.