1. Division of Dental Diagnostic Science, Rutgers School of Dental Medicine, Newark, NJ, USA.
2. Division of Oral and Maxillofacial Radiology, Department of Comprehensive Dentistry, University of Texas Health Science Center San Antonio, San Antonio, TX, USA.
3. Oral Medicine Clinic, University of Texas Health Science Center San Antonio, San Antonio, TX, USA.
4. Department of Endodontics, University of Iowa, Iowa City, IA, USA.
5. Department of Pathology, University of Texas Health Science Center San Antonio, San Antonio, TX, USA.