Fig. 1From: Regeneration of a full-thickness defect of rotator cuff tendon with freshly thawed umbilical cord-derived mesenchymal stem cells in a rat modelCharacterization of C- and T-UC MSCs at passage 10. a Fibroblast-like morphology of cells (magnification; × 100). b Viability evaluated by trypan blue exclusion. c Viability evaluated by water-soluble tetrazolium salt (WST) assay. d Calculation of cumulative population-doubling level (CPDL). e Population-doubling time (PDT). Bar charts represent mean ± standard deviation; statistically significant at p < 0.050Back to article page