Gaps and barriers preventing sustained delivery of HPV vaccination in Kano, Kaduna, and Lagos states: An exploratory qualitative study - Chidozie Ezechukwu; Esther Oluwayemisi Ayandipo; Demilade Osoteku; Raihanah Ibrahim; Oluwafunmilayo Raheem; Amy Boldosser-Boesch; Sarah Birse; Elizabeth Weinstein; Justice Nonvignon; Goodness Hadley; Eric Aigbogun; Uchenna Igbokwe (PLoS ONE, 2026)