1. Removable Prosthodontics, Division of Restorative Sciences, Herman Ostrow School of Dentistry University of Southern California Los Angeles CA
2. Department of Prosthodontics, Institute for Dental Research, Institute of Translation Dental Science, School of Dentistry Pusan National University Yangsan Republic of Korea
3. University of Pennsylvania Philadelphia PA
4. Department of Prosthodontics Institute of Translational Dental Sciences School of Dentistry Pusan National University Yangsan Republic of Korea
5. Division of Restorative Sciences Herman Ostrow School of Dentistry University of Southern California Los Angeles CA