Please assess the completion status of the following clinical trial:

Trial Title: Seroquel in Acute Mania: Study to Investigate if Valproate Add-On Therapy is Superior to Quetiapine Monotherapy in Acutely Manic Patients

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

Eligibility Criteria:
Inclusion Criteria:~* Patients suffering from a manic or mixed episode.~Exclusion Criteria:~* Patients who have not provided personal informed consent,~* Known intolerance, hypersensitivity or lack of antimanic response to sodium valproate or quetiapine fumarate,~* Involuntary admittance/detainment.

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

Study Arms:
- 1 (Type: ACTIVE_COMPARATOR): quetiapine fumarate monotherapy
- 2 (Type: EXPERIMENTAL): Quetiapine + sodium valproate

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