1. a Assistant Professor, Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wis
2. b Associate Professor, Department of Primary Care, Ohio State University, Columbus, Ohio
3. c Adjunct Associate Professor (Clinical), Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wis
4. d Dean and Professor of Restorative Dentistry, University of Manitoba Faculty of Dentistry, Winnipeg, MB Canada