Funding for this research was provided by:
Suzhou Municipal Science and Technology Bureau (SS2019069)
National Major Science and Technology Projects of China (2020YFC2005600)
Received: 15 December 2020
Accepted: 15 April 2021
First Online: 21 April 2021
: Administrative permissions and licenses were acquired from the CLHLS by our team to access the data used in our research.
: Not Applicable.
: Dr. Chenkai Wu provides paid consultant services to HealthKeeperS, a data analytics company in China. Other authors have no conflicts of interest and no financial associations to disclose.