Zhang, Jin-Shan
Li, Long
Cheng, Wei
Funding for this research was provided by:
Natural Nature Science Foundation of China (81770595)
Beijing Municipal Administration of Hospitals’ Youth Program (QML20161304)
Capital special health development research (2016-4-2104)
Article History
Accepted: 12 March 2018
First Online: 15 March 2018
Compliance with ethical standards
:
: The authors declare no conflicts of interest.