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Abstract
The GOLD 2011 report recommends the use of symptoms, exacerbation history, and FEV1%
predicted to categorise patients into groups A-D. We investigated the choice of mMRC
or CAT on category assignment and characterization of the categories.
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1Department of Pneumology, Peking Union Medical College Hospital, Peking Union Medical
College, Chinese Academy of Medical Sciences , Beijing , China.