CONSORT flow diagram.
allergy, heart, kidney or liver disease, psychiatric
ALLERGY, VOCAL CORD PARALYSIS, NEUROLOGICAL DISORDERS
The gender of the patients had no bearing on their selection, which was limited to patients aged 20–70 years with a BMI of 18–30 kg/m2 and American Society of Anesthesiologists (ASA) grades of I-II. These were the exclusion criteria: ASA physical status III or more; predicted difficult intubation; previous known vocal cord paralysis; significant heart, kidney or liver disease; psychiatric or neurological disorders; allergy to any anaesthetic drug and/or written informed consent denied.Using a web-based response system (