1. Faculty of Health Sciences, Department of Psychology, Universidad Rey Juan Carlos, Av. de Atenas, s/n, 28922 Alcorcón, Madrid, Spain
2. Nurse Intensive Care Unit, Hospital Universitario Fundación Alcorcón, Budapest, 1, 28922 Alcorcón, Madrid, Spain
3. Anesthesia Department, Hospital Universitario Santiago de Compostela, Rúa da Choupana, s/n, 15706 Santiago de Compostela, A Coruña, Spain