1. Department of Psychiatry, University of Campania “L. Vanvitelli”, 80138 Naples, Italy
2. Department of Psychiatry, University of Perugia, 06132 Perugia, Italy
3. Department of Mental Health, ASL Napoli 1 Centro, 80147 Naples, Italy
4. Department of Psychiatry, University of Catania, 95124 Catania, Italy