Inami, Eiichi
Hamada, Ikutaro
Ueda, Keiichi
Abe, Masayuki
Morita, Seizo
Sugimoto, Yoshiaki
Article History
Received: 1 October 2014
Accepted: 7 January 2015
First Online: 6 February 2015
Competing interests
: The authors declare no competing financial interests.