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Comment
. 2007 Dec;62(12):1107-8; author reply 1108-9.

Definition of COPD GOLD stage I

Edward L Petsonk, Eva Hnizdo, Michael Attfield
Comment

Definition of COPD GOLD stage I

Edward L Petsonk et al. Thorax. 2007 Dec.
No abstract available

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Conflict of interest statement

Competing interests: None.

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References

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