Quadrivalent HPV Vaccine Evaluation Study with Addition of the Nonavalent Vaccine (QUEST-ADVANCE): protocol of an observational cohort study

Middeldorp M, Donken R, Nirmal A, Smith B, Citlali Marquez A, Bettinger JA, Brisson M, Burchell AN, Dobson SR, Dawar M, Franco EL, Grennan T, Krajden M, Mayrand M-H, McNeil Shelly, Naus M, Sauvageau C, Singer J, Smith LW, Ogilvie GS, Sadarangani M

BMJ Open. 2025;15:e100560