1. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
2. Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota
3. Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota
4. Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
5. Biointerfaces Institute, School of Dentistry, Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, Michigan