“HBV Catch-up Vaccination in Children and Adults With Incomplete or Unknown Vaccination to Reduce Hepatitis B-Related Morbidity: A Systematic Review”. Acta Medica Philippina (December 13, 2024). Accessed April 19, 2025. https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/9874.