Funding for this research was provided by:
Ministry of Human Resources and Social Security (17YJAZH093)
Received: 5 January 2020
Accepted: 2 December 2020
First Online: 4 January 2021
Ethics approval and consent to participate
: Ethical clearance was obtained from the ethics committee of Zhujiang Hospital of the Southern Medical University (2018-JWC-001). Signed informed consent was obtained from each participant. Confidentiality and anonymity were assured and confirmed. Participants were informed of their rights to withdraw from the study. All data have been secured safely with limited access to the authors only.
: The authors declare that they have no competing financial interests.