1. School of Dentistry and Department of Biostatistics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
2. University of Chicago Medical Writing Program, Chicago, IL, USA
3. Epidemiology and Biostatistics, Touro College of Dental Medicine at New York Medical College, Valhalla, NY, USA
4. School of Dentistry, Virginia Commonwealth University, Richmond, VA, USA
5. UCSF School of Dentistry, San Francisco, CA, USA