1 Mental Health Unit, Center of Epidemiology, Surveillance and Health Promotion, National Institute of Health, 299, Viale Regina Elena, 00161 Roma, Italy. Electronic address: gabriella.palumbo@iss.it.
2 Mental Health Unit, Center of Epidemiology, Surveillance and Health Promotion, National Institute of Health, 299, Viale Regina Elena, 00161 Roma, Italy.