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Louhelainen N, Stark H, Mazur W, Rytilä P, Djukanovic R, Kinnula VL. Elevation of sputum matrix metalloproteinase-9 persists up to 6 months after smoking cessation: a research study. BMC Pulmonary Medicine. 2010 Mar 14;10(1):13. doi: 10.1186/1471-2466-10-13. |