AN OPEN-LABEL, MULTICENTER, DOSE-ESCALATION PHASE I STUDY TO EVALUATE THE SAFETY, PHARMACOKINETICS, AND THERAPEUTIC ACTIVITY OF RO6958688, A NOVEL T-CELL BISPECIFIC ANTIBODY THAT TARGETS THE HUMAN CARCINOEMBRYONIC ANTIGEN (CEA) ON TUMOR CELLS AND CD3 ON T CELLS, ADMINISTERED INTRAVENOUSLY IN PATIENTS WITH LOCALLY ADVANCED AND/OR METASTATIC CEA(+) SOLID TUMORS