Olesen, Jes, Goadsby, Peter J., Ramadan, Nabih M., Tfelt-Hansen, Peer, Welch, K. Michael A ; Olesen, Jes ; Goadsby, Peter J ; Olesen, Danish Headache Centre Department of Neurology Glostrup Hospital Jes ; Ramadan, Nabih M ; Tfelt-Hansen, Peer ; Welch, K Michaela