Is there a role for combined anti-PD-1/CTLA-4 checkpoint blockade in the management of advanced biliary tract cancers?

Klein O, Kee D, Nagrial A, Markman B, Underhill C, Michael M, Behren A, Palmer J, Tebbutt NC, Carlino MS, Cebon J. Cancer, 129, no. 7: 1129-30, doi:10.1002/cncr.34660.