1. School of Dentistry; Departments of Orthodontics & Dentofacial Orthopedics and Oral & Craniofacial Sciences; University of Missouri-Kansas City; Kansas City MO USA
2. School of Dentistry; Department of Orthodontics; Oregon Health and Science University; Portland OR USA
3. School of Dentistry; Department of Orthodontics; University of North Carolina at Chapel Hill; Chapel Hill NC USA
4. Division of Orthodontics; University of California San Francisco; San Francisco CA USA
5. College of Dentistry, Department of Oral Health Science; University of Kentucky; Lexington KY USA