De Guzman, I. C. S. (2018). Tracheal Diameter Estimates Using Age-Related Formula Versus Radiographic Findings: Which Approximates the Actual Tracheostomy Tube in Pediatric Patients?. Philippine Journal of Otolaryngology Head and Neck Surgery, 33(2), 32–36. https://doi.org/10.32412/pjohns.v33i2.271