...For dose escalation:Objective response rate (ORR)Duration of response (DOR)Disease control rate (DCR) = CR + PR + SD (any duration)PK profile of XMT-1536, its release product, and metabolitesAnti-drug antibody levels and nAb levels NaPi2b protein or RNA levels measured in tumor samplesFor dose expansion:PK profile of XMT-1536, its release product, and metabolitesAnti-drug antibody levels and nAb levels NaPi2b protein or RNA levels measured in tumor samplesAnalyze the effect of NaPi2b expression on objective responseDOR, PFS, OSSub-group analyses of responses in ovarian cancer patients including patientspreviously treated and failed therapy with bevacizumab and patients with and without BRCA mutation who were previously treated and failed therapy with PARP inhibitors.Uplift:Confirmed investigator-assessed ORR in the entire ITT populationORR by IRR in the ITT-Higher NaPi2b population; ORR by IRR in the entire ITT populationDOR in the ITT-Higher NaPi2b populationDOR in the entire ITT populationSafety and tolerability measures...