title: Comment on Sagel et al.
authors.forename: Clement L
authors.initials: CL
authors.lastname: Ren
mesh_terms: D015415:Biomarkers / Q000378:metabolism; D003550:Cystic Fibrosis / Q000201:enzymology* / Q000503:physiopathology; D006801:Humans; D007249:Inflammation / Q000201:enzymology / Q000503:physiopathology; D019272:Leukocyte Elastase / Q000378:metabolism; D008168:Lung / Q000201:enzymology* / Q000503:physiopathology; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D013183:Sputum / Q000201:enzymology*
chemical_list: D015415:Biomarkers; D019272:Leukocyte Elastase; D020780:Matrix Metalloproteinase 9