Comparison of storage methods
| 1. Cryopreservation | EPCs proliferation, endothelial functions and viability do not change |
| 2. Limited number of culture passages | EPC phenotype and functions do not change |
| 3. DMSO combined with K＋ modified TiProtec (K＋ TiP) | Cell recovery after thawing |
EPC: endothelial progenitor cell, DMSO: dimethyl sulfoxide.