Please assess the completion status of the following clinical trial:

Trial Title: Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Brain Tumor Surgery

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

Eligibility Criteria:
Inclusion Criteria:~* Written informed consent of patient or legal representative~* 25(OH)D level below 20ng/dL~Exclusion Criteria:~* Other trial participation, including previous participation in the pilot trial~* Pregnant or lactating women~* Hypercalcemia~* Hyperphosphatemia~* Tuberculosis~* Sarcoidosis~* History of nephrolithiasis~* History of hyperparathyroidis~* Medications that interfere with vitamin D metabolism~* Renal Insufficiency

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

Study Arms:
- vitamin D (Type: EXPERIMENTAL): Intervention patients will be received a single dose of 300000 IU vitamin D via intramuscular injection
- control (Type: OTHER): Control patients will not be received any intervention

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