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  1. Relationship between depression and lung function in the general population in Korea: a retrospective cross-sectional study
  2. Relationship between airway obstruction and incidence of metabolic syndrome in Korea: a community-based cohort study
  3. Association of serum ferritin levels with smoking and lung function in the Korean adult population: analysis of the fourth and fifth Korean National Health and Nutrition Examination Survey
  4. Cut-off value of FEV1/FEV6 as a surrogate for FEV1/FVC for detecting airway obstruction in a Korean population
  5. Relationship between blood levels of heavy metals and lung function based on the Korean National Health and Nutrition Examination Survey IV–V
  6. Comorbidities in obstructive lung disease in Korea: data from the fourth and fifth Korean National Health and Nutrition Examination Survey