[1] Headache Unit,Neurology Department
[2] Hospital Universitari Vall d’Hebron,Headache Research Group, Department of Medicine
[3] Vall d’Hebron Institute of Research,Department of Neurology, Danish Headache Center
[4] Universitat Autonoma de Barcelona,Department of Clinical Medicine
[5] Copenhagen University Hospital–Rigshospitalet,undefined
[6] University of Copenhagen,undefined
[7] New England Institute for Neurology and Headache,undefined
[8] H. Lundbeck A/S,undefined