Effect of hypoxia-mimicking BGs on hMSC viability. An alamarBlue assay was performed after hMSCs were treated with BG-conditioned media (1.5 mg/mL) for 1, 2, 4, and 7 days. (*) Indicates that the difference between the marked bar and the control (cells cultured with standard cell culture media, with no BG) for the same time period is statistically significant. (¥) Indicates that the difference between the marked bar and the sample treated with the dissolution products of BG0Co for the same time period is statistically significant (p<0.05). hMSC, human mesenchymal stem cell.