Authors’ contributions
Jiajia WANG, Xinwei HOU, and Xiao ZHANG designed the study. Xueting WANG, Weiwei QIN, and Qiujie LI recruited patients. Jiajia WANG, Xinwei HOU, and Xiao ZHANG performed statistical processing and wrote the manuscript. Fuguo MA and Lixin SUN revised the manuscript. All authors are aware of and responsible for the research data. All authors read and approved the manuscript in its final version.