Preclinical PET imaging with the novel human antibody 89Zr-DFO-REGN3504 sensitively detects PD-L1 expression in tumors and normal tissues ========================================================================================================================================= * Marcus P Kelly * Sosina Makonnen * Carlos Hickey * T Cody Arnold * Jason T Giurleo * Richard Tavaré * Makenzie Danton * Christian Granados * Ishita Chatterjee * Drew Dudgeon * Marc W Retter * Dangshe Ma * William C Olson * Gavin Thurston * Jessica R Kirshner