Funding for this research was provided by:
National Natural Science Foundation of China (82072458, 81772251)
Joint Funds for the innovation of science and Technology, Fujian province (2019Y9136)
The Middle-aged Backbone Project of the Fujian Provincial Health and Family Planning Commission (2019-ZQN-55)
Received: 29 May 2020
Accepted: 10 February 2021
First Online: 21 February 2021
Ethics approval and consent to participate
: This study was approved by the Ethics Committee and Institutional Review Board of our institution. An informed consent was signed by each patient before the data was collected.
: Informed consent for publication were obtained from participants in written.
: The authors declare that they have no conflicts of interest.