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Article History

Received: 9 December 2019

Revised: 23 March 2020

Accepted: 1 April 2020

First Online: 4 May 2020

Ethics approval and consent to participate

: This study was approved by the Regional Ethical Review Board in Stockholm, Sweden (Dnr. 02-556; Dnr. 2011/921-32; Dnr. 2012/216-32 and Dnr. 2012/1426-32), which determined that written informed consent by the study participants was not required. The study was performed in accordance with the Declaration of Helsinki.

: Data from the study is available on request from corresponding author.

: J.D. is formerly recipient of grants on HPV vaccine research from Merck/SPMSD, and grants to his employer (Karolinska University Hospital) from Roche and Genomica; M.L. has received grants for his HPV vaccination studies from Merck & Co., Inc. and GSK Biologicals through his employers T.H.L. and Tampere University; the other authors have no conflict of interest to declare; no financial relationships with any organisations that might have an interest in the submitted work in the previous three years; no other relationships or activities that could appear to have influenced the submitted work.

: This work was supported by CoheaHr (FP7-F3-2013-603019), Swedish Foundation for Strategic Research (KF10-0046); Swedish Cancer Society (CAN 2016/840); Swedish Research Council (2017-02346) and the China Scholarship Council (201507930001).

: The study sponsor did not participate in study design, data collection, analysis, interpretation of data, writing of the article or the decision to submit it for publication.