1. Department of Pediatric Dentistry, School of Dentistry, University of North Carolina at Chapel Hill, NC, USA
2. Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, NC, USA
3. Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan Ann Arbor, MI, USA
4. Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA