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Headaches can be a real headache. But what causes them, and why? Dr. Stephanie Nahas is on hand to help us get our heads examined. Also, the Book Club takes an unexpectedly cosmopolitan turn, and... Mailbag!\xa0Thanks to Paula's best friend in the whole world, french horn virtuoso, maestro Jim Ross as this week's house band!\xa0\n\n\nGUEST\nDr. Stephanie\xa0Nahas\xa0\nAssociate Professor, Jefferson University\nDirector, Headache Medicine Fellowship Program\n\n\nHOUSE BAND\nJim Ross\nHorn\nLearn more about your ad choices. Visit megaphone.fm/adchoices