1. Dental Student, University of Iowa College of Dentistry & Dental Clinics; Iowa City Iowa
2. Professor Emeritus, Department of Prosthodontics, University of Iowa College of Dentistry & Dental Clinics, Iowa City, Iowa
3. Clinical Professor, Department of Preventive and Community Dentistry, University of Iowa College of Dentistry & Dental Clinics, Iowa City, Iowa
4. Professor and Chair, Department of Preventive and Community Dentistry, University of Iowa College of Dentistry & Dental Clinics, Iowa City, Iowa