1. Critical Care Unit, Hospital Universitario Fundación Alcorcón (Madrid), Madrid, Spain
2. PhD student, Universidad Rey Juan Carlos, Alcorcón (Madrid), Madrid, Spain
3. Anesthesiology Resident, Complejo Hospitalario Universitario de Santiago, Santiago de Compostela (A Coruña), Spain
4. Department of Psychology, Universidad Rey Juan Carlos, Alcorcón (Madrid), Spain