Time frame: Predose (0 hr) on Day 1 of Cycle 1 up to 120 days after last dose of study treatment until death/study closure (up to approx 7 yrs) (Detailed timeframe provided in outcome measure description)
Dose-Escalation Cohorts: Predose (0 hr), 0.5 hr post-infusion (infusion duration=60 minutes [min]) on Day 1 of Cycles 1-5, 7 (Cycle length=21 days); Days 2, 4, 8, 15 of Cycle 1; predose (0 hr) on Day 1 of Cycles 8, 10, 12, 14, 16, 17, 20, every 8 cycles thereafter (up to approx 7 yrs), at treatment discontinuation & then every 30 days for up to 120 days after last dose of study treatment until death/study closure (up to approx 7 yrs) Expansion Cohort: Predose (0 hr), 0.5 hr post-infusion (infusion duration=60 min) on Day 1 of Cycles 1-4 (Cycle length=21 days); Days 2, 8, 15 of Cycle 1; predose (0 hr) on Day 1 of Cycles 2-5, 7, 8, 16, 17, 20, every 8 cycles thereafter (up to approx 7 yrs), at treatment discontinuation & then every 30 days for up to 120 days after last dose of study treatment until death/study closure (up to approx 7 yrs)