1. Department of Diagnostic Sciences University of North Carolina at Chapel Hill School of Dentistry Chapel Hill NC USA
2. Discipline of Oral and Maxillofacial Surgery Faculty of Dentistry National University of Singapore Singapore Singapore
3. Department of Biostatistics Gillings School of Global Public Health The University of North Carolina at Chapel Hill Chapel Hill NC USA
4. Formerly of Department of Biostatistics Gillings School of Global Public Health The University of North Carolina at Chapel Hill Chapel Hill NC USA
5. Department of Comprehensive Care Tufts University School of Dental Medicine Boston MA USA