Maekawa, Yoichi
Ishifune, Chieko
Tsukumo, Shin-ichi
Hozumi, Katsuto
Yagita, Hideo
Yasutomo, Koji
Article History
Received: 8 August 2014
Accepted: 21 October 2014
First Online: 15 December 2014
Competing interests
: The authors declare no competing financial interests.