Figure 5: Subscapularis tendon tear size at 4 weeks postinjection. , one-way ANOVA, Tukey’s post hoc test between two groups. SAL (group 1, normal saline 0.2 mL); PDRN (group 2, PDRN 0.2 mL); MSC (group 3, MSC 0.2 mL); and MSC + PDRN (group 4, MSC 0.2 mL with PDRN 0.2 mL). PDRN: polydeoxyribonucleotide; MSC: human umbilical cord blood-derived mesenchymal stem cell.