Contribution to authorship
All authors contributed to the conception and design of the study. YX carried out the research, analyzed the data, interpreted the data and drafted the article. HL operate colposcopy examination and biopsy. XX, YL, SL, RZ, CH coordinated the cervical screening activities. FC interpreted the data and drafted the article. All authors reviewed the article and critically revised it for important intellectual content. All authors reviewed and approved the final article for publication.