1. Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA
2. Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
3. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
4. Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, TX, USA