Authors’ contributions
N.Z. and H.M. were responsible for the study’s conceptual development and design. H.M., J.X., H.Y., J.Z., Z.W., J.L., W.H., H.Y. and C.W. were responsible for recruiting participants, data collection and follow-up. J.Z., J.X. and Z.W. were responsible for data processing and diagrams. J.Z. wrote the paper. All authors contributed to and approved the final manuscript. All authors read and approved the final manuscript.