Pengaruh Kultur Statis (2D) dan Kultur Dinamis (3D) terhadap Proliferasi Sel, Kadar Total Protein Conditioned Medium, dan Sitokin TGF-β pada Sel Punca Mesenkimal Asal Tali Pusat = Effects of Static Culture (2D) and Dynamic Culture (3D) on Cell Proliferation, Total Conditioned Medium Protein Content, and Cytokine TGF-β in Mesenchymal Stem Cells from the Umbilical Cord