1. Department of Oral Radiology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
2. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA.
3. Department of Radiology, Harvard Medical School, Boston, MA, USA.
4. Department of Oral Radiology, School of Dentistry, University of Okayama, Okayama, Japan.