An Open-Label, Multicenter, Long-term Treatment Extension Study in Subjects Who Have Completed a Prior GlaxoSmithKline/TESARO-Sponsored Niraparib Study and Are Judged by the Investigator to Benefit From Continued Treatment With Niraparib

Inclusion Criteria: * Participant is able to understand the study procedures and agrees to participate in the study by providing written informed consent. * Participant is willing and able to comply with scheduled visits, treatment plans, and any other study procedures. * Participant is currently receiving treatment with niraparib (as monotherapy or in combination) in a GlaxoSmithKline/TESARO-sponsored study that has fulfilled the requirements for the primary objective. * Participant is currently benefiting from treatment with niraparib as assessed by the Investigator according to the parent…