1. Department of Internal Medicine and Public Health, University of Bari, I 70124 Bari, Italy.
2. Department of Pharmacobiological Sciences, University of Bari, I 70124 Bari, Italy.
3. Department of Odontostomatology and Surgery, University of Bari, I 70124 Bari, Italy.
4. Department of Morphological, Eidological and Clinical Sciences, University of Pavia, I-27100 Pavia, Italy.