Funding for this research was provided by:
Department of Health of Hebei Province (20210846)
Received: 24 June 2021
Accepted: 12 August 2021
First Online: 21 August 2021
: Ethics approval and consent to participate in present study was approved by the Ethics Committee of Affiliated Hospital of Chengde Medical College
: Not applicable.
: The authors declare that they have no competing interests.