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Cytokine profile of mesenchymal stromal cell‐derived extracellular vesicles (MSC‐EVs). A, Cytokine profiling for proinflammatory cytokines in multiple clinical‐grade (CelCon) and research‐grade (Exo) EV batches from umbilical cord (UC)‐derived MSC isolated by tangential flow filtration (TFF) and subsequent ultracentrifugation is shown. B, Cytokine profiling including brain‐derived neurotrophic factor (BDNF) for one representative EV preparation is shown
