2673243 Exos exosomes 586 2673242 EXOs exoskeletons 9 2673248 EXOs Exoskeletons 2 2673249 EXOs Exosome 1 2673252 EXOs exosomes derived from M2-polarized macrophages 1 2673253 EXOs exosomes from healthy ADMSCs 1 2673250 EXOs KO-EXOs 1 2673251 EXOs UCMSC-EXOs in vivo, the exosomes 1