1 Professor Emeritus, Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN; Associate Editor, Research, The Journal of the American Dental Association, Independent Oral Health Research Consultant.
2 Professor, Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN.
3 Adjunct Professor, Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN.
4 Assistant Professor, Department of Periodontology, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Oslo, Norway.
5 Professor and Chair, Department of Health Policy and Health Services Research, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA.