Zeng, Hui-yang http://orcid.org/0000-0001-5823-7543
Liu, Qian
Peng, Xiao-yan
Cao, Kai
Jin, Shan-shan
Xu, Ke
Funding for this research was provided by:
Beijing Municipal Health System High-level Professionals training program (2015)
Article History
Received: 16 January 2019
Revised: 30 April 2019
Accepted: 14 May 2019
First Online: 22 May 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.