Vu, Ngoc, and Phuc Pham. “Umbilical Cord-Derived Mesenchymal Stem Cell Transplantation for COVID-19 Patients: Long-Term Benefits for Lung Regeneration”. Biomedical Research and Therapy 9, no. 2 (February 28, 2022): 4950-4952. Accessed November 24, 2024. http://bmrat.org/index.php/BMRAT/article/view/725.