Recommended Phase 2 dose was determined by maximum tolerated dose (MTD). MTD is the highest dose with \<33% of participants having a dose-limiting toxicity (DLT) during the first 6-week cycle of treatment. DLT is an adverse event (AE) that is likely related to study drug or combination and fulfills any 1 of the following: Common Terminology Criteria for AE (CTCAE, Version 3.0) Grade (Gr) 4 neutropenia lasting ≥5 days; Gr 4 neutropenia with fever; Gr 4 thrombocytopenia; Gr ≥3 thrombocytopenia with bleeding; Gr ≥3 nonhematologic toxicity (excluding controllable nausea/vomiting or diarrhea and alopecia); Gr 3 electrolyte toxicity that is not resolved with standard treatments; Gr ≥3 elevated hepatic enzyme abnormalities in the setting of preexisting hepatic metastasis may not be considered a DLT; a DLT can be declared if a participant experiences increasing toxicity during treatment.