Defining tumor resistance to PD-1 pathway blockade: recommendations from the first meeting of the SITC Immunotherapy Resistance Taskforce ========================================================================================================================================= * Harriet M. Kluger * Hussein A. Tawbi * Maria L. Ascierto * Michaela Bowden * Margaret K. Callahan * Edward Cha * Helen X. Chen * Charles G. Drake * David M. Feltquate * Robert L. Ferris * James L. Gulley * Shilpa Gupta * Rachel W. Humphrey * Theresa M. LaVallee * Dung T. Le * Vanessa M. Hubbard-Lucey * Vassiliki A. Papadimitrakopoulou * Michael A. Postow * Eric H. Rubin * Elad Sharon * Janis M. Taube * Suzanne L. Topalian * Roberta Zappasodi * Mario Sznol * Ryan J. Sullivan