Funding for this research was provided by:
Shandong Medical and Health Science and Technology Development Project (No.2017WS454)
Article History
Received: 18 October 2020
Accepted: 8 June 2021
First Online: 24 June 2021
Declarations
:
: The study was conducted in accordance with the principles of the Declaration of Helsinki and received ethical approval from the Medical Ethics Committee of Shandong Provincial Qianfoshan Hospital, Shandong University(2020S554). Because of the retrospective nature of the study, the Medical Ethics Committee of Shandong Provincial Qianfoshan Hospital, Shandong University approved there was no need for consent to participate to be obtained. The first and second authors are colposcopists of the department of obstetrics and gynecology, Shandong Qianfoshan Hospital and have access to the medical system. They completed colposcopy in these cases and had permission to use the medical records of the study from the head of the department.
: Not applicable.
: All authors have declared no competing interests.