Fig. 2

Primary and subculture results of HuMSCs (original magnification: 40 ×). a HuMSCs migrated outward from the tissue block when cultured for 5–7 days, with spindle-shaped and polygonal star shape. b HuMSCs'proliferation reached 80%−90% fusion when primarily cultured for 14 days. c The second generation cells reached 90% confluence. d The third-generation cells reached 90% confluence