Affiliation: | 1. Department of Preventive and Community Dentistry, College of Dentistry, University of Iowa, Iowa, IA, USA;2. Department of Family Dentistry, College of Dentistry, University of Iowa, Iowa, IA, USA;3. Department of Operative Dentistry, College of Dentistry, University of Iowa, Iowa, IA, USA;4. Department of Oral Pathology, Radiology and Medicine, College of Dentistry, University of Iowa, Iowa, IA, USA |