Punzalan, Kenneth Aristotle, Rhoda Yu, and Iza Mae Chamen. “External Quality Assessment Scheme for Transfusion Transmissible Infections Among Blood Service Facilities in the Philippines, 2018”. The Philippine Journal of Pathology 4, no. 2 (September 12, 2019): 54–57. Accessed April 26, 2026. https://www.philippinejournalofpathology.org/index.php/PJP/article/view/147.