1. Department of Community Dentistry and Behavioral Sciences, University of Florida College of Dentistry, Gainesville, FL, USA
2. Department of Clinical and Community Sciences, School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA
3. Private dental practice, Atlanta, GA, USA
4. Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
5. HealthPartners, Minneapolis, MN, USA
6. Department of Restorative Dental Sciences, Operative Dentistry Division, University of Florida College of Dentistry, Gainesville, FL, USA