1. Department of Orthodontics, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
2. Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
3. Department of Integrative Biomedical and Diagnostic Sciences, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
4. Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, Johnson City, TN, USA