918 Functional heterogeneity of CD4+ tumor-infiltrating lymphocytes by Marco Donia, Mads H Andersen, Martin Lauss, Göran Jönsson, Arianna Draghi, Katja Harbst, Inge Svane, Torben Lorentzen, Shawez Khan, Mario Presti, Christopher A Chamberlain, Agnete WP Jensen, Michael D Crowther, Anne-Christine K Rasmussen, Benedetta Albieri