126 Early-phenotype Lewis Y CAR-T cells persist better in vivo and induce solid tumor regression in combination with anti-PD1 oleh Deborah Meyran, Joe Zhu, Jeanne Butler, Sean Macdonald, Daniela Tantalo, Niko Thio, Kevin Sek, Paul Ekert, Michael Kershaw, Joe Trapani, Phillip Darcy, Paul Neeson