1. Assistant Professor, Department of Orthodontics, College of Dentistry, University of Florida, Gainesville.
2. Instructor, Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada.
3. Professor and Head, Department of Preventive Dental Science, Division of Orthodontics, Faculty of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada.
4. Information Technologist, Department of Community Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada.