- Prior treatment with any anti-CTLA4 monoclonal antibody or anti-PD-1, or PD-L1 or PD-L2 agent. Examples of PD-1 inhibitors (include, but are not limited to): pembrolizumab (Merck); Nivolumab (also known as BMS-936558, MDX-1106, ONO-4538) (Bristol-Myers Squibb); Pidilizumab (CT-11) (Cure-Tech/Teva); and AMP-224 (Amplimmune). Examples of PD-L1 inhibitors (include, but are not limited to): BMS-936559 (also known as MDX-1105) (Bristol-Myers Squibb); MPDL3280A (also known as RG7446) (Roche Genentech); and MEDI4736 (MedImmune).