A Long-Term Study of Rovalpituzumab Tesirine

Optional retreatment with rovalpituzumab tesirine (0.3 mg/kg or previously adjusted dose) administered intravenously once every 6 weeks beginning on Day 1 (day of dosing) for 2 dose cycles

Rovalpituzumab tesirine (0.3 mg/kg or previously adjusted dose) administered intravenously once every 6 weeks beginning on Day 1 (day of dosing). Subjects will receive rovalpituzumab tesirine on Day 1 of each 6-week cycle, omitting every third cycle until disease progression or study drug discontinuation.