Please assess the completion status of the following clinical trial:

Trial Title: Effects of Spinal Cord Stimulation on Gait in Patients With Parkinson´s Disease

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Diagnosed Parkinson´s Disease with Hoehn Yahr scale between 2,5 and 4,0~* Main complaint of balance or freezing of gait~* Score of 2 or more on subitem 3.11 of the MDS UPDRS scale concerning Freezing of Gait severity.~* Capable of informed consent~Exclusion Criteria:~* Frequent lower limb, lower back or hip pain scoring 3 or more on visual analog scale~* Uncontrolled or serious comorbidities such as uncontrolled diabetes mellitus, renal disease, anticoagulation, immunosuppression or other medical conditions that present a contraindication for SCS surgery~* Psychosis, uncontrolled depression (BDI \>14) or anxiety disorder (BAI \>14)

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Study Arms:
- Active stimulation (Type: EXPERIMENTAL): During active stimulation phase, patients will receive through the spinal cord stimulator active tonic stimulation with amplitude set to 90% of paresthesia inducing threshold, therefore allowing blinding. Patients will be evaluated after a three week wash out period with no stimulation and after three weeks of continuous active stimulation.
- Sham stimulation (Type: SHAM_COMPARATOR): During sham stimulation phase, patients will receive through the spinal cord stimulator a zero amplitude stimulation, therefore having no electrical current passing through epidural leads but with the program status still displayed as on if checked with patient's personal controller. Patients will be evaluated after a three week wash out period with no stimulation and after three weeks of continuous sham stimulation.

Based on this trial design, predict the completion outcome and termination type (if applicable).