Chen, Aiqun
Sun, Ying
Li, Wenchan
Yang, Jihong
Yao, Zhiming
Shi, Lei
Jia, Jing
Funding for this research was provided by:
Capital Health Project Beijing Science Committee (Z131100004013042)
Article History
Received: 24 February 2019
Accepted: 6 May 2019
First Online: 21 May 2019
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the Declaration of Helsinki and approved by the ethics committee of Beijing Hospital. (Ethical approval number: LLKYPJ 2012041).
: Written informed consent was obtained from all participants.