1 Department of Neurology, Klinikum Augsburg Neurologische Klinik, Augsburg, Germany
2 Department of Dermatology and Skin Science, University of British Columbia, Canada
3 Department of Ophthalmology and Visual Sciences, University of British Columbia, Canada
4 Swedish Pain and Headache Center, Seattle, Washington, USA
5 Harvard Medical School, Spaulding Rehabilitation Hospital Massachusetts General Hospital, Boston, Massachusetts, USA
6 Allergan, Inc., Irvine, California, USA
7 Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, USA
8 Visage Communications, Mead, Washington, USA
9 Department of Neurology, University of California, Irvine, California, USA