1. Clinical Research Center for Periodontal Diseases, University of Minnesota School of Public Health, 420 Delaware St., SE, Minneapolis, MN 55455
2. Division of Biostatistics, University of Minnesota School of Public Health, 420 Delaware St., SE, Minneapolis, MN 55455
3. Divisions of Oral Radiology, University of Minnesota School of Public Health, 420 Delaware St., SE, Minneapolis, MN 55455
4. Pediatric Dentistry, University of Minnesota School of Dentistry, 515 Delaware St., SE, Minneapolis, MN 55455
5. Department of Psychology, University of Minnesota College of Liberal Arts, 75 East River Road, Minneapolis, MN 55455