Letter to the Editor
American Journal of Respiratory and Critical Care Medicine
American Thoracic Society
School of Medical and Health Sciences
To the Editor: The Rome chronic obstructive pulmonary disease (COPD) exacerbation proposal is a welcome step forward (1). Celli and colleagues have attempted to revise the definition and propose a new severity classification, based on measurable clinical and laboratory variables instead. The central role of healthcare use when defining exacerbations has held us back from a better understanding of these critical events. ...
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