Yang, Tiefeng
Zheng, Biyuan
Wang, Zhen
Xu, Tao http://orcid.org/0000-0001-5436-0077
Pan, Chen
Zou, Juan
Zhang, Xuehong
Qi, Zhaoyang
Liu, Hongjun http://orcid.org/0000-0002-6656-2669
Feng, Yexin
Hu, Weida
Miao, Feng http://orcid.org/0000-0002-0962-5424
Sun, Litao http://orcid.org/0000-0002-2750-5004
Duan, Xiangfeng
Pan, Anlian
Article History
Received: 15 June 2017
Accepted: 3 November 2017
First Online: 4 December 2017
Competing interests
: The authors declare no competing financial interests.