An adverse event (AE) was any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product during the course of a study and which does not necessarily have to have a causal relationship with this treatment. An Serious adverse event (SAE) was an AE resulting in any of the following outcomes: death; life-threatening event; required or prolonged inpatient hospitalization; persistent or significant disability/incapacity; congenital anomaly. TEAEs are any untoward medical incidence in a participant during administered study treatment, whether or not these events were related to study treatment.

Recommended Phase 2 dose was determined by maximum tolerated dose (MTD). MTD was defined as the next lower dose level below the one in which \> 1 of 3 participants or ≥ 2 of 6 participants experienced dose-limiting toxicity (DLT), provided that that dose level is ≤25% lower than the highest dose tested. If the projected MTD was \>25% lower than the highest dose tested, then an additional cohort of ≥3 participants were added at a dose that was intermediate between the intolerable dose and the next lower dose.