New daily persistent headache in the pediatric population

¹From the Department of Neurology, Albert Einstein College of Medicine, Bronx, NY, U.S.A., ²Cleveland Headache Center at Cleveland Clinic, Cleveland, OH, U.S.A., ³Department of Neurology, University of California at Los Angeles, Los Angeles, CA, U.S.A., ⁴The New England Center for Headache, Stamford, CT, U.S.A.