Authors’ contributions
& L.C.
All authors made substantial contributions to the study. Study concept and design: Y.S. & L.C.; literature search: Y.S. W.L. & Z.Z.; acquisition of data: W.L., Z.Z., S.M.L., Y.Y.C.& L.Y.; statistical analyses: Y.S. & L.C.; drafting of the manuscript: Y.S. & L.C.. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.