1. Department of Medical Sciences and Public Health, University of Cagliari, Monserrato Blocco I (CA), 09042 Cagliari, Italy
2. University Hospital of Cagliari, 09042 Cagliari, Italy
3. Department of Pedagogy, Psychology, Philosophy, University of Cagliari, 09123 Cagliari, Italy
4. Department of Nursing, Universidad Popular del Cesar, Valledupar 200001, Colombia