Unfortunately, the presentation of Fig. 4 was incorrect.
The corrected Fig. 4 is given below. Fig. 4 The AO/PI staining of a alginate, b PLGA, MSCs remained >90 % viable in both scaffold cultured after 7 day, AO green, PI red
The AO/PI staining of a alginate, b PLGA, MSCs remained >90 % viable in both scaffold cultured after 7 day, AO green, PI red