1 Child Neuropsychiatry Division, Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy. Electronic address: stefanos@uniss.it.
2 Microbiology Division, Department of Biomedical Sciences, University of Sassari, Sassari, Italy.
3 Pediatric Clinic, Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy.
4 Child Neuropsychiatry Division, Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy.