12. Prohibited Prior Treatments and/or Therapies: a) Prior therapy with an anti-KIR, anti-PD-1, or anti-PD-L1, antibody. b) Prior treatment regimens with any immune cell modulating antibody such as anti-CD137 and anti-OX40. However, prior anti-CTLA4 therapy is allowed if the last dose is 101 days or more from the first dose of study drug. c) Exposure to any other investigational drug within 2 weeks prior to the first dose of study drug (within 101 days for anti-CTLA4 therapy). d) Any anti-cancer therapy (e.g., chemotherapy, biologics, vaccines, radiotherapy with curative intent, or hormonal treatment) within 2 weeks prior to the first dose of study drug administration (within 101 days for anti-CTLA4 therapy administration.