Affiliation: | a Free Practitioner in Orthodontics, Naples, Italy;b Postgraduate student, Department of Dentistry, Orthodontics and Oral Surgery, Faculty of Medicine and Surgery, Second University of Naples, Naples, Italy;c Associate professor and head, Postgraduate Orthodontic Program, Department of Dentistry, Orthodontics and Oral Surgery, Faculty of Medicine and Surgery, Second University of Naples, Naples, Italy;d Researcher, Medical Statistics, Department of Medicine and Public Health, Faculty of Medicine and Surgery, Second University of Naples, Naples, Italy |