Overall Survival among subjects who receive at least one dose of blinded study therapy Approximately 41 months after the 1st subject is randomized [clinicaltrials_resource:4830e97f9c44e3b68722f7dae59172ec]

Ipilimumab: IV solution, Intravenous (IV), 10 mg/kg, Once every 3 weeks for 4 doses, then every 12 weeks, Until progression of disease or unacceptable toxicity, or until the maximum treatment period of 3 years is reached Etoposide: IV solution, IV, 100 mg/m2, Days 1-3 every 3 weeks, 4 cycles Cisplatin: IV solution, IV, 75 mg/m2, Once every 3 weeks, 4 doses Carboplatin: IV Solution, IV, Area Under the Curve (AUC) 5, Once every 3 weeks, 4 doses

Overall Survival among subjects who receive at least one dose of blinded study therapy Approximately 41 months after the 1st subject is randomized [clinicaltrials_resource:4830e97f9c44e3b68722f7dae59172ec]

Ipilimumab: IV solution, Intravenous (IV), 10 mg/kg, Once every 3 weeks for 4 doses, then every 12 weeks, Until progression of disease or unacceptable toxicity, or until the maximum treatment period of 3 years is reached Etoposide: IV solution, IV, 100 mg/m2, Days 1-3 every 3 weeks, 4 cycles Cisplatin: IV solution, IV, 75 mg/m2, Once every 3 weeks, 4 doses Carboplatin: IV Solution, IV, Area Under the Curve (AUC) 5, Once every 3 weeks, 4 doses