J Tanzer1, P Milgrom2, C E Huebner3, J Horst4. 1. 1 University of Connecticut School of Dental Medicine, Oral Health and Diagnostic Science, Farmington, CT, USA. 2. 2 University of Washington, Dental Public Health Sciences, Seattle, WA, USA. 3. 3 University of Washington, Health Services, Seattle, WA, USA. 4. 4 University of California, San Francisco, CA, USA.