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Migraine Disorders
Vertebral Artery Dissection
Aneurysm, Dissecting
Stroke
Hypertension
Case Control Studies
Magnetic Resonance Angiography
Double-Blind Method
Prospective Studies
Logistic Models
Risk Factors
Treatment Outcome
Dihydroergotoxine
Flunarizine
Arteries
Brain
Recurrence
Co-Publications
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