Immunologic Response and Clinical Course After Off-label Nonavalent HPV Vaccination in Juvenile-onset Recurrent Respiratory Papillomatosis Patients - Neele M. Thurau; Inga Tometten; Nadine Lübke; Birgitta E. Michels; Daniela Höfler; Fabian Rosing; Peter Sehr; Katharina Remke; Jörg Timm; Steffi Silling; Tim Waterboer; Dirk Schramm; et al. (Pediatric Infectious Disease Journal, 2026)