(E) Histogram depicting the percentage of macrophages in the BALF of RA, BPD, PBS injected-, MSC-CM EXO 25 wks injected-, scr siRNA EXO 25 wks injected-, TSG-6 siRNA EXO 25 wks injected-BPD mice at PN14. The gene discussed is TNFAIP6; the disease is bronchopulmonary dysplasia.