1. Michigan Center for Oral Health Research and Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, USA
2. Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, USA
3. School of Dentistry and Dental Research Institute, University of California–Los Angeles, USA
4. Henry Samueli School of Engineering and Applied Science, University of California–Los Angeles, USA