Patients will be poly (adenosine diphosphate-ribose) polymerase (PARP)-inhibitor and immunotherapy (IMT)-naïve (defined as no prior exposure to PARP inhibitors or IMT, including, but not limited to, other anti-cytotoxic T-lymphocyte-associated protein 4 [CTLA-4], anti-programmed cell death 1 [PD-1], anti-programmed death-ligand 1 [PD-L1] monoclonal antibodies, or any other antibody or drug specifically targeting T-cell co-stimulation or checkpoint pathways).