Funding for this research was provided by:
National Natural Science Foundation of China (81703896, 81673776)
Capital Health Research and Development of Special (2016-2-4062)
Beijing municipal science and technology commission (Z171100001017209)
National Key Research and Development Program of China (2017YFC0108102)
Received: 28 September 2019
Accepted: 18 December 2019
First Online: 14 February 2020
Ethics approval and consent to participate
: This study dealt with published data only, no ethical approval was needed.
: Not applicable.
: The authors declare that they have no competing interests.