Author contributions
All authors approved the final version of the study. Study design: CLC,
PL, LW, JHL. Literature search: PFL, JQL, ZQL. Figures: PFL,JQL. Data
analysis: CLC, PFL, XNB,. Data interpretation: All authors. Data
collection: PFL, ZQL. Drafting of the manuscript: PFL, JQL. Obtained
funding: CLC. Supervision: CLC, LW, PL, JHL.
Funding : This study was funded by The National Science and
Technology Support Program of China (2014BAI05B03), the National Natural
Science Fund of Guangdong (2015A030311024), the Science and Technology
Plan of Guangzhou (158100075).
Competing interests : All authors have completed the ICMJE
uniform disclosure form atwww.icmje.org/coi_disclosure.pdf; no financial relationships with any organizations that might have an
interest in the submitted work; and all authors have no conflicts of
interest to disclose.
Ethical approval : The establishment of the clinical diagnosis
and treatment for cervical cancer in mainland China (Four C) database
was approved by the Ethics Committee of the Southern Hospital of
Southern Medical University. The ethical approval number is
NEEC-2017-135, and the clinical research registration number is
CHiCTR1800017778 (International Clinical Trials Registry Platform Search
Port,http://apps.who.int/trialsearch/).
Data sharing : Additional data available from the corresponding
author at ccl1@smu.edu.cn. The
lead author (CC) affirms that this manuscript is an honest, accurate,
and transparent account of the study being reported; that no important
aspects of the study have been omitted; and that any discrepancies(and,
if relevant, registered) from the study as planned have been explain.