Phosphatidylserine-deficient small extracellular vesicle is a major somatic cell-derived sEV subpopulation in blood oleh Akihiro Matsumoto, Yuki Takahashi, Kosuke Ogata, Shimpei Kitamura, Naoki Nakagawa, Aki Yamamoto, Yasushi Ishihama, Yoshinobu Takakura