1 Private practice of orthodontics, Cergy, France; visiting professor, Department of Orthodontics, Faculty of Dental Surgery, Lille University, Place de Verdun, Lille, France. dr.nappee@gmail.com.
2 Private practice of orthodontics, Cergy, France.
3 Department of Orthodontics, School of Dentistry, Loma Linda University, Loma Linda, CA.