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. 2015 Nov 5;25:15063. doi: 10.1038/npjpcrm.2015.63

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Copyright © 2015 Primary Care Respiratory Society UK/Macmillan Publishers Limited

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Relationships (a) between post-bronchodilator test forced expiratory volume in 1 s % predicted (post-BT FEV₁% predicted) and the CAT score and (b) between post-BT FEV₁% predicted and the mMRC scale. *P<0.05.