1. Department of Periodontology; University of Giessen; Giessen Germany
2. Department of Periodontology and Synoptic Dentistry; Charité - Medical University Berlin; Berlin Germany
3. Cariology Unit; Department of Oral Rehabilitation and Interdisciplinary Excellence Research Program on Healthy Aging (PIEIES); University of Talca; Talca Chile
4. Department of Developmental and Surgical Sciences; University of Minnesota; Minneapolis MN USA
5. Department of Diagnostic and Biological Sciences; University of Minnesota; Minneapolis MN USA