Please assess the completion status of the following clinical trial:

Trial Title: Timolol Eye Drops in the Treatment of Acute Migraine Headache

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

Eligibility Criteria:
Inclusion Criteria:~* Diagnosis of migraine headache~Exclusion Criteria~* Non-migraine headache~* Use of systemic beta-blocker~* Medical history of hypotension, bradycardia, syncope or other significant cardiovascular disease~* Medical history of difficulty breathing, asthma or chronic obstructive pulmonary disease or other pulmonary disease~* Medical history of glaucoma, ocular hypertension or hypotony, punctual stenosis, current use of other ophthalmic medications~* Previous adverse reaction to timolol or other beta-blockers~* Inability to self-administer eye drop due to physical or cognitive disorders~* Currently pregnant or breastfeeding~* Pregnant in the past year~* Non-english speaker

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

Study Arms:
- Timolol eye drops (Type: ACTIVE_COMPARATOR): All subjects received timolol eye drops or placebo (artificial tears) for two months then crossed over to the opposite medication for the final two months of the study.
- Artificial tears (Type: PLACEBO_COMPARATOR): All subjects received timolol eye drops or placebo (artificial tears) for two months then crossed over to the opposite medication for the final two months of the study.

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