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Postbronchodilator lung volume components are shown divided by global initiative for chronic obstructive lung disease (GOLD) stage and BMI. The normal column represents measurements from an age-matched healthy, nonsmoker population. UW: underweight; NW: normal weight; OW: overweight; OB: obese; IC: inspiratory capacity; ERV: expiratory reserve volume; RV: residual volume, from O'Donnell et al. [12].
