Warning: XSLTProcessor::transformToXml() [xsltprocessor.transformtoxml]: I/O warning : failed to load external entity "file:////srv/scielo/www/bases/xml/mdc/v28/1029-3043-mdc-28-e4069.xml" in /srv-new/scielo/www/htdocs/class.XSLTransformerPHP5.php on line 36 Factores de riesgo asociados al cáncer pulmonar en pacientes adultos