Author contributions
EJL, JSK, DHK, MHL contributed to the study design, protocol and study
materials. HSS, JSK, SWY collected study data. HSS, SWY, SHK, SJN
designed the statistical plan and data analysis. HSS, SWY performed the
statistical analysis. EJL, MGK, JSK, HSS, wrote the first draft of the
manuscript. All authors contributed to interpretation of the data and
revision of the manuscript.
Running title : Effect of outdoor air pollutants on the risk of
COPD exacerbations
Keywords : Chronic Obstructive Pulmonary Disease exacerbation,
air pollutant, environmental factors
Sources of funding : None
Text word count: 2602 words
Number of tables and/or figures: 4/3