AUTHORS’ CONTRIBUTIONS
Kewei Ma had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Conception and design: Kewei Ma and Yinghui Xu. Acquisition, analysis, or interpretation of data: Xu Wang, Chao Sun, Junya Song. Drafting of the manuscript: Yinghui Xu, Zhiru Gao. Statistical analysis: Hua He, Ye Guo, Shi Qiu, Xiaohui Ma. Critical revision of the manuscript for important intellectual content: All authors.