Patient distribution in the histopathologically defined subgroups.
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Emphysema extent was semi-quantitatively scored by two observers in consensus, using a 4-point scale: score 0 (no emphysematous changes); score 1 (0–20% emphysema); score 2 (20–50% emphysema); and score 3 (>50% emphysema). Areas of established fibrosis or bronchiectasis were excluded from the estimation.Patient distribution in the histopathologically defined subgroups.
创建时间：
2015-12-03
