dition that occurs at the same time as MS. Moreover, in an email to Reuters Health, study investigator Dr. Ilya Kister emphasized that over 99% of migraineurs will not develop MS, since MS is a rare disease, while migraines are quite common; about one in 5 women in the US will have a migraine over the course of a year.The study involved over 116,000 women who were part of the Nurses' Health Stud