1. UOC Maxillo Facial Surgery, Policlinico Gemelli Foundation, Catholic University Medical School, Rome, Italy
2. Department of Anesthesiology and Intensive Care Medicine, Policlinico Gemelli Foundation, Catholic University Medical School, Rome, Italy
3. Institute of Public Health, Policlinico Gemelli Foundation, Catholic University Medical School, Rome, Italy
4. Department of Biomedical, Surgical and Oral Sciences, School of Dentistry, University of Milan, Milan, Italy