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Continuous and bimonthly publicationISSN (on-line): 1806-3756
Ernesto Crisafulli1, Giulia Sartori1
DOI: 10.36416/1806-3756/e20210389
Crisafulli1 E, Sartori1 G. A shadow in the GOLD ABCD classification system: measurement of perception of symptoms in COPD. J Bras Pneumol. 2021;47(5):e20210389