title: Serum samples should not be used to assess circulating matrix metalloproteinase-9 levels as a prognostic marker of disease.
authors.forename: Jose E
authors.initials: JE
authors.lastname: Tanus-Santos
authors.forename: Raquel F
authors.initials: RF
authors.lastname: Gerlach
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood*; D002294:Carcinoma, Squamous Cell / Q000097:blood / Q000175:diagnosis / Q000201:enzymology; D006258:Head and Neck Neoplasms / Q000097:blood / Q000175:diagnosis / Q000201:enzymology; D006801:Humans; D020780:Matrix Metalloproteinase 9 / Q000097:blood*; D009360:Neoplastic Cells, Circulating / Q000378:metabolism*; D011379:Prognosis
chemical_list: D014408:Biomarkers, Tumor; D020780:Matrix Metalloproteinase 9