<b>Table E1: Study participant demographics.</b>

Table E1: Study participant demographics. Data is presented as mean ± standard error of the mean (SEM). COPD: Chronic Obstructive Pulmonary Disease; M: Male; F: Female; FEV1 : Forced expiratory volume in 1 second; FVC: Forced vital capacity. †: 1 pack-year represents 20 cigarettes per day for 1 year. Significant differences are highlighted in bold; ***: p<0.0005. compared to non-smokers. ##:p<0.005 compared to smokers. ‡: Full demographic information was not available for one subject involved in this project.