1. Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
2. Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
3. Division of Constitutive and Regenerative Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
4. Department of Oral and Maxillofacial Pathology and Medicine, School of Dentistry, National and Kapodistrian University of Athens, Greece