1. Division of Orthodontics, School of Dental Medicine, University of Connecticut, Farmington, CT, USA.
2. Department of Growth and Development, Orthodontic Section, College of Dentistry, University of Nebraska Medical Center, Lincoln, NE, USA.
3. Division of Orthodontics, School of Dentistry, University of Louisville, Louisville, KY, USA.
4. Private Practice, Spring, TX, USA.