The Editors Ole Fejerskov, DDS, PhD, DSc (Odont), DSc (Odont) (h.c. multpl) is Professor Emeritus in the Department of Biomedicine, Faculty of Health, at Aarhus University in Denmark. Bente Nyvad, DDS, MPH, PhD, DSc (Odont) is Professor of Oral Ecology and Caries Control in the Department of Dentistry and Oral Health, Faculty of Health at Aarhus University in Denmark.