The normal clinical course of trial stimulation will continue under the supervision of Dr. Lad and the SJM representative for up to 11 days to evaluate the efficacy of the trial SCS lead. Subjects will return to the Duke Spine Clinic (1B) at the end of this period for evaluation, x-ray imaging to confirm trial lead locations, and removal of the subdural trial lead. The epidural trial lead will then be activated, marking the beginning of the second half of study Phase II. All study procedures from the first half of Phase II will be repeated, this time using the epidural trial lead. Subjects will then continue normal clinical evaluation of the epidural trial lead with their care team, followed by removal of the epidural trial lead in the Duke Spine Clinic. The study team will review study participation with the subject and collect all remaining diaries at this time.