1. Department of Mental Health, Reggio Emilia Local Health Trust, Reggio Emilia, Italy
2. Cmed Polyspecialistic Diagnostic and Therapeutic Centre, Rome, Italy
3. Department of Psychology, Psychopathology and development Research Unit, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
4. Psychiatry Service (116D), San Francisco VA Medical Center, San Francisco, CA
5. Department of Psychiatry, University of California, San Francisco, CA
6. Department of Medicine, Division of Psychiatry, Clinical Psychology and Rehabilitation, University of Perugia, Perugia, Italy