Chu, Trixy G., Daniel Rafael R. Cachola, Mary Agnes S. Regal, Agnes Cecille G. Llamas, Norberto V. Martinez, and Wilfredo R. Santos. “Pneumococcal Conjugate Vaccine (Non-Typeable Haemophilus Influenzae (NTHi) Protein D, Diphtheria or Tetanus Toxoid Conjugates) in Prevention of Acute Otitis Media in Children: A Cohort Study”. Philippine Journal of Otolaryngology Head and Neck Surgery 31, no. 2 (November 30, 2016): 13–15. Accessed May 5, 2024. https://pjohns.pso-hns.org/index.php/pjohns/article/view/223.