1. Department of Public Health, University of Naples Federico II, Italy
2. Department of Advanced Biomedical Sciences, University Hospital of Naples 'Federico II, Italy
3. San Giovanni di Dio e Ruggi d'Aragona University Hospital, Italy
4. University of Rome La Sapienza, Italy
5. Department of Public Health, University of Naples Federico II, Italy and Interdepartmental Center for Research in Healthcare Management and Innovation in Healthcare (CIRMIS), University of Naples Federico II, Italy