1. Department of Periodontics and Oral Medicine, Michigan Center for Oral Health Research, University of Michigan School of Dentistry, 24 Frank Lloyd Wright Dr., Lobby M, Box 422, Ann Arbor, MI 48106 USA
2. Biostatistics Department, School of Public Health, University of Michigan, 1420 Washington Heights, Ann Arbor, MI 48109-2029, USA
3. Department of Periodontics and Oral Medicine, Michigan Center for Oral Health Research, University of Michigan School of Dentistry, 24 Frank Lloyd Wright Dr., Lobby M, Box 422, Ann Arbor, MI 48106 USA Department of Periodontology, School of Dental Medicine, University of Bern, Switzerland
4. Department of Bioengineering, University of California at Berkeley, Berkeley, CA 94720, USA
5. Department of Biologic and Material Sciences, School of Dentistry, University of Michigan, 1210 Eisenhower Place, Ann Arbor, MI 48108, USA
6. Biosystems Research Department, Sandia National Laboratories, MS 9292, PO Box 969, 7011 East Avenue, Livermore, CA 94551-0969, USA
7. Department of Periodontics and Oral Medicine, Michigan Center for Oral Health Research, University of Michigan School of Dentistry, 24 Frank Lloyd Wright Dr., Lobby M, Box 422, Ann Arbor, MI 48106 USA Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA william.giannobile@umich.edu