RT Journal Article SR Electronic T1 Response to ‘Declines in anogenital warts diagnoses since the change in 2012 to use the quadrivalent HPV vaccine in England: data to end 2017’ by Checchi et al JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 554 OP 554 DO 10.1136/sextrans-2019-054101 VO 95 IS 7 A1 Valérie Berlaimont A1 Sarah Welby YR 2019 UL http://sti.bmj.com/content/95/7/554.abstract AB