Oyanagi, Hiroyuki
Orimoto, Yuuichi
Hayakawa, Kuniko
Hatada, Keisuke
Sun, Zhihu
Zhang, Ling
Yamashita, Kenichi
Nakamura, Hiroyuki
Uehara, Masato
Fukano, Atsuyuki
Maeda, Hideaki
Article History
Received: 6 August 2014
Accepted: 4 November 2014
First Online: 26 November 2014
Competing interests
: The authors declare no competing financial interests.