1. School of Advanced Studies, University of Camerino, 62032 Camerino, Italy
2. Forensic Medicine, Forensic Science and Sports Medicine Section, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy
3. Occupational Medicine, Respiratory Diseases and Toxicology Section, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy