“Comparison of Ketorolac and Indomethacin for the Closure of Patent Ductus Arteriosus Among Preterm Infants Born at the Philippine General Hospital: A Randomized Controlled Crossover Design”. Acta Medica Philippina 56, no. 9 (May 26, 2022). Accessed October 3, 2025. https://luna.upm.edu.ph/index.php/acta/article/view/5338.