Extracellular Vesicles Released from Neprilysin Gene-Modified Human Umbilical Cord-Derived Mesenchymal Stem Cell Enhance Therapeutic Effects in an Alzheimer's Disease Animal Model. - Jeong, HyeJu; Kim, Ok Joon; Oh, Seung-Hun; Lee, Sanghoon; Reum Lee, Han A.; Lee, Kee Ook; Lee, Boo-Yong; Kim, Nam Keun (Stem Cells International, 2021)