[1] Albert Einstein Coll Med, Bronx, NY 10467 USA
[2] Michigan Head Pain & Neurol Inst, Ann Arbor, MI USA
[3] Rigshosp Glostrup, Glostrup, Hovedstaden, Denmark
[4] Alder BioPharmaceut Inc, Bothell, WA USA
[5] Pacific Northwest Stat Consulting Inc, Woodinville, WA USA