“…hUCMSCs were prepared, identified, and cultured according to a recently published protocol (23). At passage 6, the expression of cell surface markers was analyzed with flow cytometry using fluorescein isothiocyanate (FITC)-conjugated human monoclonal antibodies such as CD14 (BioLegend, 325623), CD31 (BioLegend, 303103), CD34 (BioLegend, 343603), CD105 (BioLegend, 323203), CD45 (BioLegend, 304005), CD44 (BioLegend, 338803), CD73 (BioLegend, 344015), human leukocyte antigens-D region (HLA-DR, BioLegend, 307603), phycoerythrin (PE)-conjugated human antibodies against CD90 (BioLegend, 328109), and PE-CD29 (BioLegend, 303003).…”