Misolas, Augosto, Maria Veronica Eulogio, Marites Go, Laura Magat, Evangeline Castillo, and Jennifer Deoduco-Mercado. 2024. “Proficiency Testing Program for Screening Drug Testing Laboratories in the Philippines, 2009-2019”. PJP 9 (1). https://philippinejournalofpathology.org/index.php/PJP/article/view/451.