1. Cleveland Clinic Lerner College of Medicine of Case Western Reserve University Cleveland Ohio USA
2. Department of Radiation Oncology Cleveland Clinic Taussig Cancer Institute Cleveland Ohio USA
3. Department of Radiation Oncology Rush University Medical Center Cleveland Ohio USA
4. Head and Neck Cancer Program Cleveland Clinic Head and Neck Institute Cleveland Ohio USA
5. Department of Hematology and Oncology Cleveland Clinic Taussig Cancer Institute Cleveland Ohio USA
6. Department of Pathology Cleveland Clinic Pathology and Laboratory Medicine Institute Cleveland Ohio USA