Division of Oral Medicine, University of Pennsylvania Health System, Philadelphia, Pennsylvania;4. Department of Oral and Maxillofacial Surgery and Bluestone Center for Clinical Research, New York University College of Dentistry, New York, New York;5. Division of Craniofacial and Surgical Care, Adams School of Dentistry, University of North Carolina, Chapel Hill, North Carolina;6. Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota;7. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts;8. Department of Radiation Oncology, Dana-Farber Cancer Institute/Brigham & Women's Hospital, Boston, Massachusetts;9. Department of Radiation Oncology, University of Pennsylvania Health System, Philadelphia, Pennsylvania;10. Section of Oral Medicine, University of Connecticut Health, Farmington, Connecticut