Improved Small Extracellular Vesicle Secretion of Rat Adipose‐Derived Stem Cells by Microgrooved Substrates through Upregulation of the ESCRT‐III‐Associated Protein Alix. Issue 20 (21st October 2021) - Ji, Yurong; Han, Weiju; Fu, Xiaoling; Li, Jing; Wu, Qi; Wang, Yingjun