1. Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122 Perugia, Italy
2. Department of Life Sciences, University of Modena and Reggio Emilia, Via G. Campi 103, 41125 Modena, Italy
3. Department of Toxicology, Faculty of Pharmacy, Gazi University, 06560 Ankara, Turkey
4. Department of Medicine and Surgery, University of Perugia, Piazzale S. Gambuli 1, 06132 Perugia, Italy