Misolas, Augosto, Maria Veronica Eulogio, Marites Go, Laura Magat, Evangeline Castillo, and Jennifer Deoduco-Mercado. “Proficiency Testing Program for Screening Drug Testing Laboratories in the Philippines, 2009-2019”. The Philippine Journal of Pathology 9, no. 1 (May 6, 2024): 27–36. Accessed April 26, 2026. https://www.philippinejournalofpathology.org/index.php/PJP/article/view/451.