1. Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA
2. Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA
3. Department of Anatomy, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
4. Department of Bioengineering, School of Medicine, University of Washington, Seattle, WA
5. Department of Oral Biology and Diagnostic Sciences, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
6. Department of Pathology, School of Medicine, University of Washington, Seattle, WA