736 A phase 1/2 open-label, dose-escalation study of ST-067, a decoy-resistant IL-18 cytokine, given as a monotherapy and with pembrolizumab in advanced solid tumor malignancies by Mario Sznol, Harriet Kluger, Igor Puzanov, Gerald S Falchook, Ryan Sullivan, Matthew H Taylor, Justin C Moser, Aaron M Ring, Virginia E Paton, David Chonzi, Brage Garofalo, Mark Sonnemann, Hirdesh Uppal, Jeremy Barton, Beatrice Y McQueen