[1] Mayo Clin, Dept Neurol, Scottsdale, AZ USA
[2] Albert Einstein Coll Med, Bronx, NY 10467 USA
[3] Thomas Jefferson Univ, Philadelphia, PA 19107 USA
[4] Vall Hebron Univ Hosp & Inst Res, Dept Neurol, Headache Unit, Barcelona, Spain
[5] New England Inst Neurol Headache, Stamford, CT USA
[6] Dent Neurol Inst, Buffalo, NY USA
[7] AbbVie Inc, Madison, NJ USA
[8] AbbVie, Madison, NJ USA
[9] AbbVie Inc, Madison, NJ USA