1. Department of Oral Health Practice College of Dentistry Center for Oral Health Research University of Kentucky Lexington KY USA
2. Division of Orthodontics Department of Oral Health Science College of Dentistry University of Kentucky Lexington KY USA
3. Department of Periodontology College of Dentistry University of Florida Gainesville FL USA
4. Division of Periodontology School of Dental Science Trinity College Dublin Dublin Ireland
5. Department of Oral and Craniofacial Health Sciences School of Dentistry The University of North Caroline Chapel Hill NC USA