Fig. 7From: Therapeutic effects of adipose-tissue-derived mesenchymal stromal cells and their extracellular vesicles in experimental silicosisMean interquartile range, median, and concentration of vesicles (bars/symbols represent means ± SD of 4–6 independent experiments). a Concentration of vesicles per cell normalized by the initial values of freshly obtained vesicles. b Freshly obtained conditioned medium versus thawed medium after 3 weeks of storage at − 80 °C were used to isolate EVs. c Each sample of EVs was measured before and after aerosolization with a microsprayer syringeBack to article page