Relationship between plasma matrix metalloproteinase levels, pulmonary function, bronchodilator response, and emphysema severity by Koo HK, Hong Y, Lim MN, Yim JJ, Kim WJ

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Hand grip strength in patients with chronic obstructive pulmonary disease by Jeong M, Kang HK, Song P, Park HK, Jung H, Lee SS, Koo HK

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Chronic cough as a novel phenotype of chronic obstructive pulmonary disease by Koo HK, Park SW, Park JW, Choi HS, Kim TH, Yoon HK, Yoo KH, Jung KS, Kim DK

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Association of blood eosinophils and plasma periostin with FEV1 response after 3-month inhaled corticosteroid and long-acting beta2-agonist treatment in stable COPD patients by Park HY, Lee H, Koh WJ, Kim S, Jeong I, Koo HK, Kim TH, Kim JW, Kim WJ, Oh YM, Sin DD, Lim SY, Lee SD

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Additional Usefulness of Bronchoscopy in Patients with Initial Microbiologically Negative Pulmonary Tuberculosis: A Retrospective Analysis of a Korean Nationwide Prospective Cohort... by Oh JY, Lee SS, Kim HW, Min J, Ko Y, Koo HK, Jeong YJ, Kang HH, Kang JY, Kim JS, Park JS, Kwon Y, Yang J, Han J, Jang YJ, Lee MK, Jegal Y, Kim YC, Kim YS

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