“Umbilical Cord Mesenchymal Stem Cells Secretome in Osteoarthritis Patients: A Case Report ”. Gema Lingkungan Kesehatan 23, no. 4 (December 22, 2025): 600–604. Accessed February 11, 2026. https://gelinkes.poltekkes-surabaya.ac.id/index.php/gelinkes/article/view/245.