1. Private Practice, Catania 95123, Italy
2. Department of Medical-Surgical Specialties, School of Dentistry, University of Catania, Policlinico Universitario “G. Rodolico-San Marco”, Via Santa Sofia 78, Catania 95123, Italy
3. Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples “Federico II”, Naples, Italy
4. Regenerative Medicine Research Laboratory, Saint Camillus University of Health Sciences, Rome, Italy