There was no statistically significant relationship between the number of coughing episodes during the procedure and any of the following variables: positive cough test, a habitual cough, tobacco dependence, or severity of chronic obstructive pulmonary disease.
Historia del artículo: Recibido el 19 de junio de 2012 Aceptado el 23 de enero de 2013 On-line el 26 de marzo de 2013