GOLD stage 1 is crying wolf.
Enright
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D000328:Adult; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology*; D018570:Risk Assessment; D012307:Risk Factors; D014797:Vital Capacity / Q000502:physiology