1. Department of Stomatology, Tuscan Stomatologic Institute, Foundation for Dental Clinic, Research and Continuing Education, 55041 Camaiore, Italy
2. San Rossore Dental Unit, San Rossore Private Hospital, 56122 Pisa, Italy
3. Department of Dentistry, Unicamillus International Medical University, 00100 Rome, Italy
4. New Smiles Dental Implant Center Galleria, 2930 Chimney Rock Rd, Houston, TX 77057, USA