1. Department of Surgical Sciences, University of Genoa, 16126 Genoa, Italy
2. Independent Researcher, 12058 Santo Stefano Belbo, Italy
3. Independent Researcher, 36027 Rosà, Italy
4. Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences, University of Genoa, 16126 Genoa, Italy