Please assess the completion status of the following clinical trial:

Trial Title: MK0431 (Sitagliptin) Pioglitazone Add-on Study for Patients With Type 2 Diabetes Mellitus (0431-055)(COMPLETED)

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

Eligibility Criteria:
Inclusion Criteria:~* Patients Have Type 2 Diabetes Mellitus~* On Diet/Exercise Therapy And Pioglitazone As Monotherapy~Exclusion Criteria:~* Patients Have Type 1 Diabetes Mellitus

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- 1 (Type: EXPERIMENTAL): MK0431 + pioglitazone
- 2 (Type: PLACEBO_COMPARATOR): Placebo/MK0431 + pioglitazone

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