1. Department of Periodontology and Dental Hygiene, University of Detroit Mercy School of Dentistry, Detroit, MI.
2. Department of Periodontics and Community Dentistry, 3D Imaging and Biomechanical Laboratory, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
3. Department of Oral Surgery and Implant Dentistry, University of Granada, Granada, Spain.
4. Department of Pathology, School of Medicine and Biopathology and Regenerative Medicine Institute, Centre for Biomedical Research, University of Granada.
5. Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI.