1. Department of Psychiatry, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy;
2. Department of Psychiatry and Behavioral Sciences, Stanford University, CA, USA;
3. Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Pisa, Italy;
4. Department of Neuroscience Rita Levi Montalcini, AOU San Luigi Gonzaga, University of Turin, Orbassano, Italy;
5. Department of Psychiatry, University of Florence, Florence, Italy;
6. Department of Health Sciences, University of Milan, Milan, Italy;
7. Institute of Psychopathology, Rome, Italy;
8. Department of Functional Neurosurgery, IRCCS Galeazzi Hospital, Tourette Center, Milan, Italy;
9. Department of Clinical and Experimental Medicine, Child and Adolescent Neuropsychiatry, University of Catania, Catania, Italy;
10. Center for Public Health Research (CESP), University of Milan Bicocca, Milan, Italy