Nakama, Chikako
Kamide, Kei
Kawai, Tatsuo
Hongyo, Kazuhiro
Ito, Norihisa
Onishi, Miyuki
Takeya, Yasushi
Yamamoto, Koichi
Sugimoto, Ken
Rakugi, Hiromi
Article History
Received: 19 February 2014
Revised: 27 June 2014
Accepted: 7 July 2014
First Online: 28 August 2014
Competing interests
: The authors declare no conflicts of interest.