Maruyama, Junichi
Kobayashi, Yumie
Umeda, Tsuyoshi
Vandewalle, Alain
Takeda, Kohsuke
Ichijo, Hidenori
Naguro, Isao
Article History
Received: 17 July 2015
Accepted: 23 November 2015
First Online: 6 January 2016
Competing interests
: The authors declare no competing financial interests.