1. Private Practice Indiana USA
2. Department of Periodontology University of Alabama at Birmingham Birmingham Alabama USA
3. Department of Periodontology, College of Dentistry UTHSC Memphis Tennessee USA
4. Private Practice Waukesha Wisconsin USA
5. Department of Periodontology Case Western School of Dental Medicine Cleveland Ohio USA
6. Department of Periodontology Indiana University School of Dentistry Indianapolis Indiana USA
7. Department of Social and Behavioral Sciences Richard M. Fairbanks School of Public Health Indianapolis Indiana USA
8. Department of Biostatistics Indiana University School of Medicine Indianapolis Indiana USA