Please assess the completion status of the following clinical trial:

Trial Title: A Study Using Botulinum Toxin Type A as Headache Prophylaxis in Adolescents With Chronic Migraine

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Medical history of chronic migraine for at least 6 months~* 15 or more headache days during a 4 week period~Exclusion Criteria:~* Previous use of any botulinum toxin of any serotype for any reason~* Diagnosis of Myasthenia gravis, Eaton-Lambert Syndrome, Amyotrophic Lateral Sclerosis~* Treatment of headache using acupuncture, transcutaneous electrical stimulation (TENS), cranial traction, dental splints, or injection of anesthetics/steroids within 4 weeks prior to the week -4 screening visit~* Use of any headache prophylaxis medication within 4 weeks prior to the week -4 screening visit

- Gender: ALL
- Minimum Age: 12 Years
- Maximum Age: 17 Years
- Healthy Volunteers: f

Study Arms:
- Botulinum toxin type A Dose 1 (Type: EXPERIMENTAL): Botulinum toxin type A Dose 1 intramuscular injections into specified muscles.
- Botulinum toxin type A Dose 2 (Type: EXPERIMENTAL): Botulinum toxin type A Dose 2 intramuscular injections into specified muscles.
- Placebo (Normal Saline) (Type: PLACEBO_COMPARATOR): Placebo (Normal Saline) intramuscular injections into specified muscles.

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