Please assess the completion status of the following clinical trial:

Trial Title: A Randomized, Parallel, Double-blind, Placebo-controlled Study of Vitamin D as Prophylactic Treatment for Migraine

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

Eligibility Criteria:
Inclusion Criteria:~* Men and women between 18 and 65, migraine must have occurred before the age of 50 years.~* Diagnosed migraine according to International Headache Society (IHS) criteria (ICHD-II)~Exclusion Criteria:~* Other neurological or neurodegenerative disorders~* Medical conditions that may interfere with the result - violent head trauma, stroke, transient ischemic attacks~* Musculoskeletal or mental illness~* Addictive or previous addictive behavior defined as the abuse of cannabis, opioids or other drugs~* Inability to cooperate~* Pregnancy or breastfeeding, including women trying to conceive~* Use of vitamin D supplementation\> 10μg~* In treatment with digoxin or thiazide~* Patients with osteoarthritis, as they are taking or have taken vitamin D supplements~* Patients with pre-existing hypercalcemia as vitamin D supplements are contraindicated in these patients

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Vitamin D (Type: ACTIVE_COMPARATOR): The active treatment consists of vitamin D and is given in tablets of the brand D3 Vitamin ®, supplied by D3 Pharmacy Ltd., Bispensgade 22, 9000 Aalborg.~The tablets contain the vitamin D in the form of vitamin D3, also known as cholecalciferol.~D3 Vitamin ® consists of small white tablets, which are easy to swallow.~D3 Vitamin ® contains 25 micrograms vitamin D3 (colecalciferol) per tablet, equivalent to 1000 IU (International Units).~Tablet Excipients: Cellulose, dicalcium phosphate, magnesium stearate, silicon dioxide and talc. Vitamin D3 ® contains no gluten, soy, gelatin or other animal products.
- Placebo (Type: PLACEBO_COMPARATOR): Placebo tablets to match D3 Vitamin ®, were produced. They are identical to the D3 Vitamin ® in appearance, ie small white tablets. These tablets do not have a therapeutic effect. Placebo tablets produced and delivered by D3 Pharmacy Ltd., Bispensgade 22, 9000 Aalborg.

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