Yang, Ruifeng
Zheng, Ying
Li, Ling
Liu, Shujing
Burrows, Michelle
Wei, Zhi
Nace, Arben
Herlyn, Meenhard
Cui, Rutao
Guo, Wei
Cotsarelis, George
Xu, Xiaowei
Article History
Received: 8 September 2014
Accepted: 10 November 2014
First Online: 16 December 2014
Competing interests
: The authors declare no competing financial interests.