Zhai, B.
Hou, C.
Xu, R.
Fang, Y.
Ma, N.
Xing, C.
Wang, X.
Xiao, H.
Chen, G.
Han, G.
Wang, R. http://orcid.org/0000-0003-4130-3334
Funding for this research was provided by:
National Nature and Science Funds (31770956 and 81471529)
Beijing Natural Science Foundation (7182121)
Article History
Received: 15 October 2019
Accepted: 26 December 2019
First Online: 16 January 2020
Compliance with ethical standards
:
: The authors declare no competing interest.
: All procedures performed in studies involving human participants and animals 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.