1. Forensic Toxicology Unit, Department of Health Science, University of Florence , L.go Brambilla 3, Florence 50134, Italy
2. Department of Biomedical Sciences, University of Sassari , Viale San Pietro 43c, Sassari 07100, Italy
3. U.R.I.To.N.—Unit of Research, University of Florence , L.go Brambilla 3, Florence 50134, Italy