1. Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
2. Department of Oral and Craniomaxillofacial Surgery, Center for Dental Medicine, University Medical Center Freiburg, Freiburg, Germany
3. College of Dental Medicine, Columbia University, New York, NY, USA
4. Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA