1. Department of Hygiene, Public Health and Preventive Medicine, University of Messina, Messina, Italy.
2. Department of Biochemical Sciences, University of Messina, Messina, Italy.
3. Department of Human Pathology, University of Messina, Messina, Italy.
4. U.O. Pathological Anatomy Hospital S. Donato, AUSL 8 Arezzo, Italy.
5. “Biosistema,” Lab.1, Department of Hygiene, Public Health and Preventive Medicine, Policlinic “Gaetano Martino,” Messina, Italy.