Tan, Xue
Fujiu, Katsuhito
Manabe, Ichiro
Nishida, Junko
Yamagishi, Reiko
Nagai, Ryozo
Yanagi, Yasuo
Article History
Received: 18 February 2015
Accepted: 28 September 2015
First Online: 28 October 2015
Competing interests
: The authors declare no competing financial interests.