Ishikawa, Nobuhisa Ageing and long-term smoking affects KL-6 levels in the lung, induced sputum and plasma. [electronic resource] - BMC pulmonary medicine May 2011 - 22 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1471-2466 Standard No.: 10.1186/1471-2466-11-22 doi Subjects--Topical Terms: AdultAgedAging--metabolismBronchi--metabolismCase-Control StudiesEpithelium--metabolismFemaleFinlandHumansLung--metabolismMaleMiddle AgedMucin-1--metabolismPulmonary Alveoli--metabolismPulmonary Disease, Chronic Obstructive--metabolismSmoking--metabolismSputum--metabolism