1. Department of Radiology Radiation Oncology Penn State Milton S. Hershey Medical Center Hershey PA USA
2. Department of Radiation Oncology Sylvester Comprehensive Cancer Center University of Miami Miami FL USA
3. Department of Radiation Oncology Icahn School of Medicine at Mont Sinai New York NY USA
4. 21st Century Oncology Kendall Oncology Center Miami FLUSA
5. Department of Radiation Oncology University of Nebraska Medical Center Omaha NE USA