The Elevated Serum Level of IFN-γ in Patients with Failed Back Surgery Syndrome Remains Unchanged after Spinal Cord Stimulation

Table 4

Controls versus IFN-γ and cytokine serum level response to SCS.

	Controls	Group 0; (before)	Group 1; (1 month after)	Group 2; (3 months after)
IFN-γ (pg/ml)
for controls versus SCS