Author contributions
Fan Yu, Shaoyou Qin, and Jiangbin Wang designed the study. Fan Yu wrote
the manuscript. Fan Yu, Shaoyou Qin, and Song Wang searched the
databases, selected the studies, assessed the quality of the included
studies, and performed the statistical analysis. Jiangbin Wang and Song
Wang approved the last version and should be regarded as
co-corresponding authors. Fan Yu and Shaoyou Qin contributed equally to
the manuscript and should be regarded as co-first authors.