[1] Geisel Sch Med, Lebanon, NH USA
[2] Med Univ Innsbruck, Dept Neurol, Innsbruck, Austria
[3] Montefiore Headache Ctr, Bronx, NY USA
[4] Mayo Clin, Phoenix, AZ USA
[5] Arzneimittelforsch Leipzig GmbH, Leipzig, Germany
[6] Amgen Inc, Thousand Oaks, CA USA