«Limitations of the New York Heart Association functional classification system and self-reported walking distances in chronic heart failure». Heart, 93, 4, 2007, pàg. 476–82. DOI: 10.1136/hrt.2006.089656. PMC: 1861501. PMID: 17005715.
«Limitations of the New York Heart Association functional classification system and self-reported walking distances in chronic heart failure». Heart, 93, 4, 2007, pàg. 476–82. DOI: 10.1136/hrt.2006.089656. PMC: 1861501. PMID: 17005715.