1. School of Dentistry Marquette University Milwaukee Wisconsin USA
2. School of Dentistry University of California at San Francisco (UCSF) San Francisco California USA
3. School of Dentistry University of Pretoria Pretoria South Africa
4. Department of Diagnostuc Sciences UTHealth School of Dentistry Houston Texas USA
5. Institute for Education and Research HealthPartners Research Institute Minneapolis Minnesota USA
6. School of Dentistry University of Sydney Camperdown New South Wales Australia