1. Department of Environmental and Radiological Health Sciences; College of Veterinary Medicine and Biomedical Sciences; Colorado State University; Fort Collins; Colorado
2. Service of Occupational Health and Safety; Azienda Sanitaria Locale; Sassari; Italy
3. Dipartimento di Agraria; Università degli Studi di Sassari; Sassari; Italy
4. Centre for Clinical Risk Management; Careggi Teaching Hospital; Florence; Italy
5. Centro Regionale Infortuni e Malattie Professionali; Regione Toscana; Florence; Italy