1. Industrial Hygiene and Toxicology Laboratory, Occupational Medicine Unit; Careggi University Hospital; Florence Italy
2. Department of Experimental and Clinical Medicine; University of Florence; Florence Italy
3. General Laboratory; Careggi University Hospital; Florence Italy
4. Department of Medical Science and Public Health; University of Cagliari; Monserrato Italy
5. Department of Neurosciences, Psychology, Drug Research and Child Health; University of Florence; Sesto Fiorentino Italy