Active MMP-8 (aMMP-8) as a Grading and Staging Biomarker in the Periodontitis Classification. - Sorsa, Timo; Alassiri, Saeed; Grigoriadis, Andreas; Räisänen, Ismo T.; Pärnänen, Pirjo; Nwhator, Solomon O.; Gieselmann, Dirk-Rolf; Sakellari, Dimitra (Diagnostics (2075-4418), 2020)