Please assess the completion status of the following clinical trial:

Trial Title: Sulfonylurea Add-on Study in Patients With Type 2 Diabetes Mellitus (0431-035)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Patients with Type 2 Diabetes Mellitus with inadequate glycemic control~Exclusion Criteria:~* Patients with Type 1 Diabetes Mellitus

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- Sitagliptin (Type: EXPERIMENTAL): Sitagliptin 10 mg tablet daily for 54 weeks
- Placebo/ Pioglitazone (Type: PLACEBO_COMPARATOR): Placebo tablet daily for 24 weeks followed by Pioglitazone tablet daily for 30 weeks

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