Author contributions
SY and JZ had full access to all data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Concept and design: SY, KH, and YS. Acquisition, analysis, or interpretation of data: JZ, DX, BX, YZ, HH, HL, HC, and YBS. Drafting of the manuscript: JZ. Critical revision of the manuscript for important intellectual content: KH. Statistical analysis: JZ. Administrative, technical, or material support: DX, YS, and SY. Supervision: YS and SY.