Increased Ratio of Matrix Metalloproteinase-9 (MMP-9)/Tissue Inhibitor Metalloproteinase-1 from Alveolar Macrophages in Chronic Asthma with a Fast Decline in FEV1 at 5-Year Follow-up. - Chung, Fu-Tsai; Huang, Hung-Yu; Lo, Chun-Yu; Huang, Yu-Chen; Lin, Chang-Wei; He, Chih-Chen; He, Jung-Ru; Sheng, Te-Fang; Wang, Chun-Hua (Journal of Clinical Medicine, 2019)