Funding for this research was provided by:
the Fujian Provincial Key Project of Science and Technology Plan (2018Y0067)
the Fujian Medical University Sailing Fund Projec (2019QH2043)
Accepted: 31 December 2020
First Online: 25 January 2021
Compliance with Ethical Standards
: The authors declare that they have no conflicts of interest.
: This is a meta-analysis based on observational studies.
: Informed consent from patients and ethical approval for this type of study are not required.