1. Department of Medical; Oral and Biotechnological Sciences; University of Chieti-Pescara; Italy
2. Department of Dentistry; San Raffaele Hospital; Vita-Salute University; Milan Italy
3. Department of Surgical and Morphological Sciences; Insubria University; Varese Italy
4. Departments of Biomaterials and Biomimetics; and Periodontology and Implant Dentistry; New York University College of Dentistry; New York