1. Department of Comprehensive Dentistry, College of Dentistry Texas A&M University Dallas TX
2. Department of Prosthodontics, School of Dentistry University of Washington Seattle WA
3. Revilla Research Center Madrid Spain
4. J. Mike Walker '66 Department of Mechanical Engineering Texas A&M University College Station TX
5. Division of Dental Biomaterials Unit, Clinic for Resconstructive Dentistry, Center for Dental and Oral Medicine University of Zürich Zürich Switzerland