1. Department of Psychiatric Science and Psychological Medicine, University of Rome “Sapienza”, Piazzale Aldo Moro, Rome, Italy
2. General Office for Military Health-Defence General Staff, Rome, Italy
3. Department of Occupational Medicine, University of Rome “Sapienza”, Viale Regina Elena, Rome, Italy
4. S. Pre. S. A.L. Azienda ASL RM/E Service of Prevention and Safety in the Workplace, Rome, Italy