Aesculetin Suppresses Airway Epithelial Barrier Disruption Induced by Inhalation of Urban Coarse Particulate: Involvement of Neutrophil Elastase and Protease-Activated Receptor‑2 - Sin-Hye Park; Young Eun Sim; Su Yeon Oh; Min-Kyung Kang; Il-Jun Kang; Young-Hee Kang (ACS Omega)