Anaesthesia will be maintained with 0.7-1.5 minimum alveolar concentration of sevoflurane and remifentanil Ce of 2-4 ng mL-1 to maintain the SE values below 50, the difference between RE and SE below 10 and the mean arterial blood pressure (MAP) and heart rate <20% of baseline values. Rocuronium increments will be used to maintain surgical relaxation.