[What criteria predict the severity of an exacerbation?].
Meurice
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JC
D018450:Disease Progression; D006801:Humans; D011379:Prognosis; D029424:Pulmonary Disease, Chronic Obstructive / Q000209:etiology* / Q000473:pathology*; D012307:Risk Factors; D012720:Severity of Illness Index