Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA

David R. Raleigh & William C. Chen

Department of Neurological Surgery, University of California San Francisco, San Francisco, CA, USA

David R. Raleigh

Department of Pathology, University of California San Francisco, San Francisco, CA, USA

David R. Raleigh

Department of Radiation Oncology, Northwestern University, Chicago, IL, USA

Vinai Gondi

Radiation Oncology, Utah Cancer Specialists, Salt Lake City, UT, USA

Leland Rogers

Miami Cancer Institute, Baptist Health, Miami, FL, USA

Minesh Mehta

Departments of Radiation Oncology, Neurological Surgery, and Pathology, University of California San Francisco, Helen Diller Family Cancer Research Building 1450 3rd Street, HD481, 94158, San Francisco, CA, USA

David R. Raleigh

D.R.R. and W.C.C. performed analyses. D.R.R. wrote the manuscript with input from W.C.C., V.G., L.R., and M.M.