Yan, Shi https://orcid.org/0000-0001-8304-8445
Tachibana, Harumasa
Wei, Lan-Hai
Yu, Ge
Wen, Shao-Qing
Wang, Chuan-Chao https://orcid.org/0000-0001-9628-0307
Article History
Received: 19 December 2014
Revised: 17 February 2015
Accepted: 22 February 2015
First Online: 2 April 2015
Competing interests
: The authors declare no conflict of interest.