Fred Ramsdell1,2, Alexander Y Rudensky3. 1. Sonoma Biotherapeutics, South San Francisco, CA, USA. framsdell@sonomabio.com. 2. Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA. framsdell@sonomabio.com. 3. Howard Hughes Medical Institute and Immunology Program, Sloan Kettering Institute and Ludwig Center, Memorial Sloan Kettering Cancer Center, New York, NY, USA. rudenska@mskcc.org.