Response to “Tumor cells in search for glutamate: an alternative explanation for increased invasiveness of IDH1 mutant gliomas”. Trister A, Scott J, Rockne R, Yagle K, Johnston SK, Hawkins-Daarud A, Baldock A, Swanson KR. Neuro Oncol. 2014 Dec;16(12):1670-1/ doi: 10.1093/neuonc/nou290. PMID: 25398942