 - Prior to registration, all subjects must have archival tissue available. For subjects who have no archival tissue, but have PD-L1 testing results using the Dako 22C3 antibody, subjects will be permitted to enroll without submitting tissue. If the patient has not had prior testing and no acceptable archival tissue is available, subjects must be willing to consent to providing a pre-treatment biopsy for PD-L1 testing. Regardless of PD-L1 testing status, archival tissue will be requested for research testing if available. 