[1] Harvard Med Sch, Brigham & Womens Hosp, John R Graham Headache Ctr, Dept Neurol,Div Headache, Boston, MA 02115 USA
[2] Harvard Med Sch, Brigham & Womens Hosp, Dept Neurol, Div Headache, Boston, MA 02115 USA
[3] Zucker Sch Med, Northwell Hlth, Dept Neurol, Hempstead, NY USA
[4] Northwell Hlth, Neurol, Great Neck, NY USA
[5] Univ Vermont, Larner Coll Med, Dept Neurol Sci, Div Headache Med, Burlington, VT USA