Contribution to authorship
XLL and HQL designed the study and RHX provided important feedback on
the proposed study design. XLL and HQL conducted the systematic
literature search, data extraction, and quality assessment; XLL
conducted the meta-analyses and interpreted the results. XLL drafted the
initial manuscript, which was thoroughly reviewed for important
intellectual content and revised by LPZ, SWW, and RHX. All authors
approved the final manuscript as submitted and agree to be accountable
for all aspects of the work.