Radiologic evaluation9 X . X9 X9 X9 aTumor biopsy and FNA may be obtained up to 14 days prior to starting therapy. For patients with only one or two tumors approac hable for biopsy, available tumor blocks from prior biopsies can serve as the pretreatment sample prov ided at least 20 unstained slides are available. b Patients who are eligible to receive additi onal cycles of IDO inhibitor without vaccinations will main tain the same visit sched ule as cycle 1 NOTE: If additional cycles of IDO inhibitor are given only the end of treatment biopsy is to be obtained when possible. Note: If additional cycles of IDO inhibitor are given a reduced volume of blood will be drawn for correlative assays. See footn ote *** below for details.