1.
Jassim S, Ibrahim L. Correlation between Periodontal Health Status and Salivary Matrix Metalloproteinase-9 Levels in Smoker and Non-Smoker Chronic Periodontitis Patients (A Comparative Study) . J Bagh Coll Dent [Internet]. 14Dec.2016 [cited 20Nov.2019];28(4):128-33. Available from: http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/1511