Hypoxic hUCMSC-derived extracellular vesicles attenuate allergic airway inflammation and airway remodeling in chronic asthma mice oleh Liyang Dong, Ying Wang, Tingting Zheng, Yanan Pu, Yongbin Ma, Xin Qi, Wenzhe Zhang, Fei Xue, Zirui Shan, Jiameng Liu, Xuefeng Wang, Chaoming Mao