“Diagnostic Yield of Bronchoscopic Techniques in Evaluating Primary Lung Cancer: The Philippine General Hospital (PGH) Experience”. Acta Medica Philippina 55, no. 4 (July 28, 2021). Accessed April 12, 2025. https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/2794.