Please assess the completion status of the following clinical trial:

Trial Title: Management of Pain Associated With Failed Back Surgery Syndrome

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Patients with Previous spine surgery and subsequent chronic back pain~Exclusion Criteria:~* Patients with connective tissue diseases~* Patients with psychiatric illnesses

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Pregabalin (Type: ACTIVE_COMPARATOR): A dose of 75 mg of Pregabalin twice daily for one month will be prescribed to each patient enrolled this study arm
- Gabapentin (Type: ACTIVE_COMPARATOR): A dose of 300 mg of Gabapentin twice daily for one month will be prescribed to each patient enrolled this study arm

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