Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (up to days before treatment initiation) Within days of treatment initiation:\r\nHemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L (without transfusion or growth factor support/erythropoietin [EPO] dependency) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within (except as noted) days of planned treatment initiation: Hemoglobin >= . g/dL or >= . mmol/L without transfusion or erythropoietin dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L, performed within days of treatment initiation, without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment registration: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of study registration Performed within business days of treatment initiation with the exception of beta- HCG ( hours), if applicable: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment). Performed within days of treatment initiation: Hemoglobin ? g/dL or ? . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), should be performed within days of treatment initiation Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment Hemoglobin ? g/dL or ? . mmol/L within days of treatment initiation without transfusion or erythropoietin (EPO) dependency (within days of assessment) Performed within days of treatment initiation: hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Within days prior to the start of study treatment: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment). Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) To be performed within days of treatment initiation: hemoglobin ? g/dL or ? . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment). Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment). Obtained =< days prior to registration: Hemoglobin > . g/dL or >= . mmol/L without transfusion or (EPO) erythropoietin dependency (within days of assessment) Within days prior to on-study date: Hemoglobin ? g/dL (or ? . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency within days Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin ? g/dL or ? . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin ? g/dL or ? . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Performed within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L\r\n* Patients cannot have received transfusion or erythropoietin (EPO) within days of the hemoglobin (Hgb) lab test Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Obtained =< days prior to registration: Hemoglobin >= . g/dL without transfusion or erythropoietin (EPO) dependency (=< days prior to assessment) Performed within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Performed within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of registration Performed within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of registration) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (within - days of treatment initiation) Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency within days performed within days of treatment initiation performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), during screening and on cycle , day Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin: >= g/dL or . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Completed within days of SBRT treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency\r\n(within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin ? g/dL OR ? g/dL if anemia due to iBCL, without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), should be performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L with transfusion or erythropoietin (EPO) dependency REGISTRATION TO TREATMENT (STEP ): Hemoglobin (Hgb) >= . g/dL OR >= . mmol/L without transfusion of erythropoietin (EPO) dependency, within days prior to first dose of pembrolizumab REGISTRATION TO TREATMENT (STEP ): Hgb >= . g/dL OR >= . mmol/L without transfusion of EPO dependency, within days prior to first dose of pembrolizumab Within days of treatment initiation: hemoglobin >= g/dl without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Within days of treatment initiation: Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin (Hgb) > g/dL (without transfusion or erythropoietin [EPO] dependency within days of assessment) Hemoglobin >= . g/dL (. mmol/L or g/L) without transfusion or erythropoietin (EPO) dependency (within days of assessment) obtained =< days prior to registration Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (within days prior to day of protocol therapy) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), performed within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment), should be performed within days of treatment initiation, unless otherwise indicated Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) within days of treatment initiation Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment) (performed within days of treatment initiation) Hemoglobin (Hgb) >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment of Hgb), obtained within days prior to C-AMT PET scan Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin dependency (=< days prior to registration), obtained =< days prior to registration Hemoglobin >= g/dL or >= . mmol/L without transfusion or erythropoietin (EPO) dependency (within days of assessment)