Efek Antiinflamasi Sekretom Sel Punca Mesenkim Tali Pusat terhadap Darah Pasien COVID-19 secara In Vitro: Kajian terhadap sIL-6R, sgp130, IL-1RA, dan Sitokin Pro/anti Inflamasi = In Vitro Anti-inflammatory Effect of Secretome from Umbilical Cord-derived Mesenchymal Stem Cells in COVID-19 Patient Blood: A Study on sIL-6R, sgp130, IL-1RA and Anti/pro Inflammatory Cytokines