“Five Cases of Non-Radiographic Spondyloarthritis (nr-SpA) of Patients from a Tertiary Care Center in the Philippines: A Case Series”. Acta Medica Philippina 58, no. 21 (November 29, 2024). Accessed April 24, 2025. https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/8251.