Figure 4. Identification of transplanted MSCs in lung tissue in vivo. (A) Transplanted cells were marked with GFP and the AECII-specific marker SP-C in red at ×200 magnification. (B) Comparative analysis of cell number in the MSCs and MSCs+EPO groups. Data are presented as the mean ± SD. *P < 0.05 compared with the MSCs group.