An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product; the untoward medical occurrence does not necessarily have a causal relationship with this treatment. An SAE means any untoward medical occurrence that at any dose results in death, is life-threatening, requires in patient hospitalization or prolongation of an existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly/birth defect or is a medically important event.

DLT was defined using National Cancer Institute Common Terminology Criteria for Adverse Events version 4.03 and included: any drug-related hematologic toxicity ≥Grade 4 with the exception of Grade 4 neutropenia \<7 days duration; Grade 3 or 4 neutropenia with fever \>38.5 degrees Celsius and/or infection or neutropenia requiring colony-stimulating factor OR non-hematologic DLTs that were any Grade 3, 4, or 5 toxicity with the following exceptions: Grade 3 nausea, vomiting, diarrhea, and dehydration occurring in a setting of inadequate treatment; inadequately treated hypersensitivity reactions; Grade 3 elevated transaminases or urine electrolyte abnormality ≤1 week in duration; Grade 3 serum electrolyte abnormality ≤72 hours in duration. DLTs also included: drug-related adverse experience that lead to a dose modification; unresolved drug-related toxicity resulted in delay in initiation of Cycle 2.