[1] Univ Copenhagen, Rigshosp Glostrup, Danish Headache Ctr, Copenhagen, Denmark
[2] Kings Coll London, NIHR Wellcome Trust Kings Clin Res Facil, London, England
[3] Albert Einstein Coll Med, Montefiore Headache Ctr, Bronx, NY 10467 USA
[4] Univ Headache Clin, Moscow, Russia
[5] Palm Beach Headache Ctr, Premiere Res Inst, W Palm Beach, FL USA
[6] Alder BioPharmaceut Inc, Bothell, WA USA
[7] Alder BioPharmaceut Inc, Dublin, Ireland