1434 TGFβ-dependent LRRC15+ myofibroblasts dictate the tumor fibroblast setpoint to promote cancer immunotherapy resistance by Yan Qu, James Ziai, Shannon Turley, Justin Elstrott, Akshay Krishnamurty, Justin Shyer, Minh Thai, Vineela Gandham, Patricia Pacheco-Sanchez, Beatrice Breart, Rachana Pradhan, Matthew Buechler, Cecile Chalouni, Soren Muller