1. Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
2. Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA
3. Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
4. Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA
5. Department of Cell molecular and Developmental Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
6. Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
7. ChemoMetec, DK-3450 Allerod, Denmark