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Pre-activated, cryopreserved, XF-hMSCs restore lung structure. All cell treatment groups significantly restored the percentage of alveolar airspace in VILI (a). Representative images of lung histology sections are provided (b). ***P < 0.001 versus PBS control group. Sham, n = 4; PBS control, n = 8; fresh, n = 8; fresh pre-activated, n = 7; cryopreserved, n = 6; cryopreserved pre-activated, n = 7
