1. Oral and Craniofacial Health Sciences, School of Dentistry, The University of North Carolina, Chapel Hill, North Carolina 27599, United States
2. Nippi Research Institute of Biomatrix, Ibaraki 302-0017, Japan
3. Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, Srinakharinwirot University, Bangkok 10110, Thailand
4. Department of Pathology and Laboratory Medicine, The University of North Carolina, Chapel Hill, North Carolina 27599, United States