Summary of Invention PICI investigators at UCSF discovered a biomarker in cancer patient samples associated with a favorable response to anti-cancer immunotherapy, comprising a subpopulation of T-cells expressing two surface proteins (CD127 and PD1) at a certain level. The biomarker can be used to identify patients likely to benefit from treatment with immunotherapy. International Publication Number WO 2018/136784 A1 (.pdf) International Application Filing Date 01.19.18 Inventors Lawrence Fong, MD Matthew Spitzer, PhD Institution University of California, San Francisco Category Biomarkers Checkpoints