Treatment-emergent AEs were defined as events that met 1 or both of the following criteria: * Any AEs with onset dates on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug * Any AEs leading to premature discontinuation of study drug

A treatment emergent serious adverse event (SAE) was defined as an event that, at any dose, results in the following: * Death * Life-threatening * In-patient hospitalization or prolongation of existing hospitalization * Persistent or significant disability/incapacity * A congenital anomaly/birth defect * A medically important event or reaction

Treatment-emergent laboratory abnormalities were defined as values that increased at least 1 toxicity grade from baseline at any postbaseline time point, up to and including the date of last dose of study drug plus 30 days for subjects who permanently discontinued study drug. If baseline laboratory data were missing, then any abnormality of at least Grade 1 was considered treatment emergent. Graded laboratory abnormalities were defined using the grading scheme in the Common Terminology Criteria for Adverse Events (CTCAE) Version 4.03 for Cohorts 1-9 and CTCAE Version 5.0 for Cohorts 10-13.