EXPRESSION OF LAG‐3 DEFINES EXHAUSTION OF INTRATUMORAL PD‐1+ T CELLS AND CORRELATES WITH POOR OUTCOME IN FOLLICULAR LYMPHOMA. (June 2017) - Yang, Z.; Kim, H.; Villasboas, J.C.; Price‐Troska, T.; Jalali, S.; Novak, A.J.; Ansell, S.M.