Martín Urrialde, José Antonio2011-09-192011-09-191998-09-19http://hdl.handle.net/10637/1539En: Fisioterapia. ISSN. 0211-5638 n. Extra 2 (1998), p. 2-7application/pdfspopen accessArtículohttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.eshttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es