?:authorAffiliation
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[\'Headache Unit, Department of Neurology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.\', \'The Danish Headache Center, Department of Neurology, Rigshospitalet-Glostrup, Faculty of Health Sciences, University of Copenhagen, Glostrup, Denmark.\', \'Department of Neurology and Neurorehabilitation, ZURZACH Care, Bad Zurzach, Switzerland.\', \'Department of Neurology, University Hospital Zurich, Zürich, Switzerland.\', \'Danish Headache Center, Rigshospitalet-Glostrup, Faculty of Health Sciences, University of Copenhagen, Glostrup, Denmark.\', \'Department of Neurology, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.\', \'Department of Neurology, Hospital Weser-Egge, Höxter, Germany.\', \'Department of Neurology, University of Duisburg-Essen, Essen, Germany.\', \'Department of Neurology, University Hospital Zurich, Zurich, Switzerland.\', \'Department of Neurology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.\', \'Metabolic Neurology, Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK.\', \'Department of Neurology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2TH, UK.\', \'Department of Neurology, Elisabeth-TweeSteden Hospital, Tilburg, The Netherlands.\', \'Department of Neurology, Akershus University Hospital, Lørenskog, Norway. e.s.kristoffersen@medisin.uio.no.\', \'Department of General Practice, HELSAM, University of Oslo, Oslo, Norway. e.s.kristoffersen@medisin.uio.no.\']
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