1. Division of Prosthodontics, Department of Restorative Sciences, School of Dentistry, School of Dentistry, University of Minnesota, Minneapolis, MN, USA
2. School of Dentistry, School of Dentistry, University of Minnesota, Minneapolis, MN, USA
3. Division of Biostatistics, School of Public Health, School of Dentistry, University of Minnesota, Minneapolis, MN, USA
4. Lai Laboratories Inc., Burnsville, MN, School of Dentistry, University of Minnesota, USA
5. Division of Oral Microbiology, Department of Oral Sciences, School of Dentistry, School of Dentistry, University of Minnesota, Minneapolis, MN, USA