Intranasal Delivery of Mesenchymal Stem Cell Derived Exosomes Loaded with Phosphatase and Tensin Homolog siRNA Repairs Complete Spinal Cord Injury. - Guo S; Perets N; Betzer O; Ben-Shaul S; Sheinin A; Michaelevski I; Popovtzer R; Offen D; Levenberg S (ACS nano, 2019)