Okamoto, Hideki
Hamao, Shino
Goto, Hidenori
Sakai, Yusuke
Izumi, Masanari
Gohda, Shin
Kubozono, Yoshihiro
Eguchi, Ritsuko
Article History
Received: 20 January 2014
Accepted: 6 May 2014
First Online: 23 May 2014
Competing interests
: The authors declare no competing financial interests.