1. Private Practice Orthodontist, Prato, Italy
2. Assistant Professor, Department of Surgery and Translational Medicine, Tuscan Dental School, The University of Florence, Florence, Italy, and Thomas M. Graber Visiting Scholar, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, The University of Michigan, Ann Arbor, Mich
3. Associate Professor, Department of Surgery and Translational Medicine, Tuscan Dental School, The University of Florence, Florence, Italy
4. Professor Emeritus, University of Aarhus, Aarhus, Denmark