1. Department of Anaesthesia and Peri‐operative Medicine University Hospital Complex of A Coruña A Coruña Galicia Spain
2. Spanish Difficult Airway Group (GEVAD) A CoruñaSpain
3. Department of Anaesthesia University Hospital Complex of A Coruña A Coruña Galicia Spain
4. Institute for Biomedical Research of A Coruña (INIBIC) Complejo Hospitalario Universitario de A Coruña A Coruña Spain