- Note: Details on clinical trials were obtained on ClinicalTrials.gov website (https://clinicaltrials.gov/ct2/home). Last upadate, December 1, 2018. IDO-1 cytosolic enzyme indoleamine 2,3-dioxygenase-1, TTF Tumor treating Fields, TIL tumor infiltrating lymphocytes, GITR Glucocorticoid induced TNF receptor, ND not discolsed, DCE: dynamic contrast-enhanced