Migraine study says nerve stimulation could bring relief

      |About 36 million Americans suffer from migraines - chronic headaches that can strike up to 15 times a month, lasting between four and 72 hours. Dr. James Galvin, professor of neurology and psychiatry at NYU Langone Medical Center, talks to the "CBS This Morning" co-hosts about a new study that could bring hope to people with migraines.

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