Gao, Wenming
Higaki, Takashi
Eguchi-Ishimae, Minenori
Iwabuki, Hidehiko
Wu, Zhouying
Yamamoto, Eiichi
Takata, Hidemi
Ohta, Masaaki
Imoto, Issei
Ishii, Eiichi
Eguchi, Mariko
Article History
Received: 5 November 2014
Revised: 12 December 2014
Accepted: 17 December 2014
First Online: 12 February 2015
Competing interests
: The authors declare no conflict of interest.