Carpio, ArturoDel Brutto, Oscar H.2015-06-152015-06-151998-12-11http://dspace.ucuenca.edu.ec/handle/123456789/22215application/pdfengopenAccesshttp://creativecommons.org/licenses/by-nc-sa/3.0/ec/Neurological ScienceLetter to the editorJournal of the Neurological SciencesOtherdoi: 10.1016 / S0022-510X (98) 00234-2