Fahlevie, Fahlevie, Hendrastutik Apriningsih, Yusup S. Sutanto, Reviono Reviono, Artrien Adhiputri, Jatu Aphridasari, and Windu Prasetyo. “Effects of Secretome Supplementation on Interleukin-6, Tumor Necrosis Factor-α, Procalcitonin, and the Length of Stay in Acute Exacerbation COPD Patients”. Narra J 3, no. 2 (August 31, 2023): e171. Accessed August 26, 2025. https://narraj.org/main/article/view/171.