Xu, Z., X. Liu, Y. Wei, Z. Zhao, J. Cao, Y. Qiao, Y. Yu, J. Zhong, and G. Suo. “Mesenchymal Stem Cell Spheroids: Potential Cell Materials for Cell Therapy”. STEMedicine, Vol. 2, no. 5, Dec. 2020, p. e67, doi:10.37175/stemedicine.v2i5.67.