[1] Hospital Clínico Universitario Valladolid,Headache Unit Neurology Department
[2] University of Copenhagen,Danish Headache Centre and Department of Neurology
[3] Rigshospitalet Glostrup,Headache Department
[4] Iranian Center of Neurological Research Neuroscience Institute,Child Neuropsychiatry School
[5] Tehran University of Medical Sciences,Neurology Department
[6] University of Palermo,Headache Center
[7] U.O. Neuropsychiatry - ARNAS Civico,Internal Medicine Department
[8] PO Di Cristina,Regional Referral Headache Centre, Department of Clinical and Molecular Medicine
[9] University Hospital of Brussels,Headache Centre
[10] Bambino Gesù Children Hospital IRCCS,Danish Headache Center, Department of Neurology
[11] Pavlov First Saint Petersburg State Medical University,Department of Clinical Physiology and Nuclear Medicine
[12] Almazov National Medical Research Centre,undefined
[13] Sant’Andrea Hospital,undefined
[14] Sant’Andrea Hospital,undefined
[15] Sapienza University,undefined
[16] Careggi University Hospital,undefined
[17] University of Florence,undefined
[18] Rigshospitalet-Glostrup,undefined
[19] University of Copenhagen,undefined
[20] Center for Functional and Diagnostic Imaging,undefined
[21] Hvidovre Hospital,undefined