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. 2015 Oct;3(10):769–781. doi: 10.1016/S2213-2600(15)00283-0

Figure 1.

Figure 1

Sample selection strategy

ATS=American Thoracic Society. ERS=European Respiratory Society.34 FEV1=forced expiratory volume in 1 s. FVC= forced vital capacity. *See appendix (pp 3–5) for more details of sample selection.