684 A low affinity bivalent mesothelin-binding MATCH4 multispecific T cell engager increases cytotoxic selectivity for high mesothelin expressing cells by Bithi Chatterjee, Alexandre Simonin, Daniel Snell, Tea Gunde, Christian Hess, Matthias Brock, Stefan Warmuth, Christopher Weinert, Niels Kirk, Dania Diem, Naomi Flückiger, Robin Heiz, Benjamin Küttner, Dana Mahler, Diego Morenzoni, Sandro Wagen, Julia Zeberer, David Urech