9.0 Author Contributions
YZL, ASFK, CSAW, and AJWY performed database searching, article screening, study selection and appraisal, and data extraction and analysis. JWT, YZL, ASFK, CSAW, and AJWY conceived the idea and wrote the manuscript. JWT supervised the study and resolved conflicts between reviewers (YZL, ASFK, CSAW, and AJWY). CLT and MTL provided important information for the completion of the manuscript. All authors read and approved the final manuscript.