Quantifying the return of headache in triptan-treated migraineurs

¹New England Center for Headache, Stamford, CT, USA, ²Department of Neurology, Albert Einstein School of Medicine, Bronx, NY, USA, ³Department of Psychiatry and Behavioral Science, Albert Einstein School of Medicine, Bronx, NY, USA, ⁴Department of Epidemiology and Population Health, Albert Einstein School of Medicine, Bronx, NY, USA, ⁵The Montefiore Headache Center, Bronx, NY, USA, ⁶Houston Headache Clinic, Houston, TX, USA, ⁷The New England Institute for Behavioral Medicine, Stamford, CT, USA, ⁸Pfizer Inc., Groton, CT, USA, ⁹Pfizer Inc., New York, NY, USA