Funding for this research was provided by:
National Natural Science Foundation of China (81771493)
National Institute on Aging (R01AG036042)
the Illinois Department of Public Health
Received: 16 February 2020
Accepted: 20 April 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: Not applicable.
: Not Applicable.
: The authors declare that they have no conflicts of interests.