Implementing the free HPV vaccination for adolescent girls aged below 14 in Shenzhen, Guangdong Province of China: experience, challenges, and lessons.

"Declarations Ethics approval and consent to participateThis study was approved by the Medical Ethics Committee of the Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University [SFYLS[2021]060]. Written consent was obtained from all participants, including parents, primary care practitioners, and key stakeholders, prior to their participation in the baseline investigation. Consent for publicationDuring the baseline investigation, all participants were informed before the surveys or interviews that the data collected from them would be used for research and publication purposes. They were assured of the confidentiality of their data and were given the right to withdraw their participation at any time. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This work was supported by the Bill & Melinda Gates Foundation [INV-018013]. Under the grant conditions of the Foundation, a Creative Commons Attribution 4.0 Generic License has already been assigned to the Author Accepted Manuscript version that might arise from this submission."