1 Department of Mental Health and Pathological Addiction, Reggio Emilia, Italy.
2 Cmed Polyspecialistic Diagnostic and Therapeutic Centre, Rome, Italy.
3 Department of Mental Health and Pathological Addiction, Reggio Emilia, Italy; Norwegian Centre for Mental Disorders Research (NORMENT), University of Oslo, Oslo, Norway. Electronic address: andrea.raballo@medisin.uio.no.