I. To evaluate if there is sufficient evidence to continue to the phase III component of S1400E by comparing investigator-assessed progression-free survival (IA-PFS) between rilotumumab plus erlotinib versus erlotinib in patients registered to S1400E. (Phase II) II. To determine if there is both a statistically and clinically-meaningful difference in IA-PFS between patients randomized to receive rilotumumab plus erlotinib versus erlotinib. (Phase III) III. To compare overall survival (OS) in patients randomized to rilotumumab plus erlotinib versus erlotinib. (Phase III)