American Thoracic Society meeting 2017. American Journal of Respiratory and Critical Care Medicine 2017;195:A7504: Mesenchymal Stromal Cells Use Extracellular Vesicle-Mediated Mitochondrial Transfer to Modulate Human Macrophage Phenotype Through Enhancement of Oxidative Phosphorylation in the In Vitro and In Vivo Models of the Acute Respiratory Distress Syndrome