Tumor cure by radiation therapy and checkpoint inhibitors depends on pre-existing immunity

Marka R. Crittenden1,2, Lauren Zebertavage3, Gwen Kramer1, Shelly Bambina1, David Friedman1, Victoria Troesch1, Tiffany Blair3, Jason R. Baird1, Alejandro Alice1 & Michael J. Gough1 1Earle A. Chiles Research Institute, Providence Portland Medical Center, Portland, OR, 97213, USA. 2The Oregon Clinic, Portland, OR, 97213, USA. 3Molecular Microbiology & Immunology, Oregon Health & Science University, Portland, OR, 97239, USA.