1. Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
2. Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
3. Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
4. Department of Occupational Health, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy