1. Faculty of Dental Medicine and Oral Health Sciences College of Dental Medicine, Kansas City University Joplin Missouri USA
2. Department of Cariology, Restorative Sciences and Endodontics University of Michigan Ann Arbor Michigan USA
3. Department of Dental Public Health University of Pittsburgh Pittsburgh Pennsylvania USA
4. Division of Pediatric Dentistry The Ohio State University College of Dentistry Columbus Ohio USA
5. Faculty of Dental Medicine and Oral Health Sciences McGill University Montreal Canada
6. Department of Periodontology Tufts University School of Dental Medicine Boston Massachusetts USA