Contribution to authorship
Xiajing Chu, Meixuan Li designed and performed the search, selected
studies for inclusion, collected data, planned and performed the
statistical analyses, Xiajing Chu, Meixuan Li contributed to the
interpretation of the results, and drafted the initial and final version
of the manuscript. Xiajing Chu, Meixuan Li, and Peijing Yan contributed
to the interpretation of the results, and reviewed and revised the
manuscript. Xiajing Chu, Meixuan Li, Jingwen Li and Lufang Feng
conceptualized and designed the study, contributed to the search,
selected studies for inclusion, supervised data collection. Xinrong Liu
and Kehu Yang contributed to the statistical analyses and interpretation
of the results, and reviewed and revised the manuscript.