1. Department of Biostatistics and Epidemiology Hudson College of Public Health University of Oklahoma Health Sciences Center Oklahoma City Oklahoma
2. Department of Oral Biology and Pathology Stony Brook University School of Dental Medicine Stony Brook New York
3. Longitudinal Radiographic Assessment Facility University of Texas Health Science Center San Antonio Dental School San Antonio Texas
4. Department of Surgical Specialties University of Nebraska Medical Center College of Dentistry Lincoln Nebraska
5. Department of Internal Medicine College of Medicine University of Nebraska Medical Center Omaha Nebraska