HZ and YW participated in the design of this study, and they both performed the
statistical analysis. HZ carried ou
HZ and YW participated in the design of this study, and they both performed the
statistical analysis. HZ carried out the study and collected important background
information. YW drafted the manuscript. All authors read and approved the final
manuscript.
YX, QL and DH carried out the concepts, design, definition of intellectual content,
literature search, data acquisition, data analysis and manuscript preparation. DZ, YB
and HY provided assistance for data acquisition, data analysis and statistical analysis.
ZL, XH and MX carried out literature search, data acquisition and manuscript editing.
YX and QL performed manuscript review. All authors have read and approved the
content
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