1. Department of Biomedical Sciences, Surgery and Pharmacy, University of Sassari, Sassari, I-07100 Sardinia, Italy
2. Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, I-07100 Sardinia, Italy
3. Institute for Genetic and Biomedical Research, National Research Council, Monserrato, Cagliari, I-09121 Sardinia, Italy
4. Division of Medical Oncology, Azienda Ospedaliera Universitaria, Sassari, I-07100 Sardinia, Italy
5. Unit of Occupational Medicine, Azienda Ospedaliera Universitaria, Sassari, I-07100 Sardinia, Italy
6. Lega Italiana per la Lotta contro i Tumori, Sassari, I-07100 Sardinia, Italy