(Q35670558)
Statements
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COPD exacerbations: the importance of a standard definition (English)
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Pauwels R
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Calverley P
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Buist AS
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Rennard S
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Fukuchi Y
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Stahl E
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Löfdahl CG
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1 February 2004
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98
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2
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99-107
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Identifiers
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