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Effect of a viral filter on cardiopulmonary exercise testing M. Sá Marques; A. Fonseca; R. Lima; I. Ladeira; J. Gomes; M. Guimarães;

COPD: Analysing factors associated with a successful treatment A. Duarte-de-Araújo; P. Teixeira; V. Hespanhol; J. Correia-de-Sousa;