Zhang, Wenjuan
Zheng, Zhaohui
Jia, Rulin
Li, Xiangpei
Zuo, Xiaoxia
Wu, Lijun
Shen, Nan
Li, Zhijun
Zhang, Yan
Wang, Guochun
Yu, Feng
Zhang, Xiao
Hu, Shaoxian
Zhang, Miaojia
Li, Xiaofeng
Sun, Shiren
Xiang, Yang
Tao, Yi
Bi, Liqi
Li, Qin
Li, Zhanguo
Zhu, Ping http://orcid.org/0000-0002-8391-4945
Article History
Received: 26 May 2019
Revised: 31 July 2019
Accepted: 2 August 2019
First Online: 14 August 2019
Compliance with ethical standards
:
: The study was performed according to the 1997 Declaration of Helsinki of the World Medical Association and has been approved by the ethics committee of each participating center, all the participants gave written informed consent.
: None.