221 CRISPR screen identifies loss of IFNγR signaling and downstream adhesion as a resistance mechanism to CAR T-cell cytotoxicity in solid but not liquid tumors by Marcela Maus, Rebecca Larson, Irene Scarfò, Max Jan, Stefanie Bailey, Amanda Bouffard, Michael Kann, Nicholas Haradhvala, Kai Stewart, Mark Leick, Trisha Berger, Julia Joung, Tamara Ouspenskaia, Travis Law, Aviv Regev, Gad Getz