1 Department of Oral Surgery, Faculty of Medicine, University of Naples Federico II, Via Pansini 5, Edificio 14, 80131 Naples, Italy.
2 Department of Oral and Maxillofacial Surgery, University of Michigan Health System, Ann Arbor, MI 48109-1078, USA; LoB5 Research Unit, School of Dentistry and Research Center for Biomineralization Disorders, Chonnam National University, Gwangju 500-757, Republic of Korea.
3 Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Guarulhos, SP, Brazil.
4 Oral Surgery and Implant Dentistry Department, School of Dentistry, University of Granada, Granada, Spain.