Original ArticleValidity Study of Catalan, Galician and Basque Language Versions of the COPD Assessment Test and Equivalence With the Spanish VersionEstudio de la validez de las versiones en catalán, gallego y vasco del cuestionario COPD assessment test
Keywords: Chronic obstructive pulmonary disease; COPD Assessment Test validation; Catalan; Galician; Basque; Enfermedad pulmonar obstructiva crónica; Validación del COPD Assessment Test; Catalán; Gallego; Vasco;