Funding for this research was provided by:
Jiangsu Provincial Funds for Six Categories of Top Talents (Program No. WS-066)
the Research Project of Jiangsu Provincial Health and Family Planning Commission (Program No. H201526)
the Nantong Technology Project (Program No. MS12017008-1, MS12020007)
Received: 28 December 2021
Accepted: 14 March 2022
First Online: 23 March 2022
: The survey protocol was approved by the Ethics Review Board of the National Center for Health Statistics (NCHS), and each participant provided written informed consent. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.