Yang, Jinxin
Zhang, Zhendong
Cheng, Hui
Xiao, Kai
Luo, Dianzhong
Zhang, Hong
Article History
Received: 5 February 2018
Accepted: 12 June 2018
First Online: 18 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: We received the ethics committee review board approval from our institution before the initiation of this study.