1. Department of Dental Diagnostic and Surgical Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
2. Department of Restorative Dentistry, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
3. Oral Health Sciences, Kristianstad University, 291 88 Kristianstad, Sweden