[1
]GRID grid.158820.6, ISNI 0000 0004 1757 2611, Neuroscience Section, Department of Applied Clinical Sciences and Biotechnology, , University of L’Aquila, ; Via Vetoio 1, L’Aquila, Italy
[2
]GRID grid.7548.e, ISNI 0000000121697570, PhD school in neurosciences; Department of biomedical, metabolic and neural sciences,
, University of Modena and Reggio Emilia, ; Modena, Italy
[3
]GRID grid.7548.e, ISNI 0000000121697570, Medical toxicology - Headache and Drug Abuse Research Center; Department of biomedical,
metabolic and neural sciences, , University of Modena and Reggio Emilia, ; Modena, Italy
[4
]GRID grid.420545.2, ISNI 0000 0004 0489 3985, The Headache Service, , Guy’s and St Thomas’ NHS Foundation Trust, ; Westminster Bridge Road, London, SE1 7EH UK
[5
]GRID grid.6363.0, ISNI 0000 0001 2218 4662, Department of Neurology, , Charité - Universitätsmedizin Berlin, ; Berlin, Germany
[6
]Private Practice, Essen, Germany
[7
]GRID grid.18887.3e, ISNI 0000000417581884, Headache and Pain Unit, , IRCCS San Raffaele, ; Rome, Italy
[8
]GRID grid.15496.3f, ISNI 0000 0001 0439 0892, San Raffaele University, ; Rome, Italy
[9
]GRID grid.492077.f, IRCCS Istituto delle Scienze Neurologiche di Bologna, ; Bologna, Italy
[10
]GRID grid.488514.4, ISNI 0000000417684285, Headache and Neurosonology Unit, , Fondazione Policlinico Universitario Campus Bio-Medico, ; Rome, Italy
[11
]GRID grid.9841.4, ISNI 0000 0001 2200 8888, Headache Center, Department of Medical, Surgical, Neurological, Metabolic, and Aging
Sciences, , University of Campania “Luigi Vanvitelli”, ; Naples, Italy
[12
]GRID grid.417306.7, ISNI 0000 0004 0447 0384, Headache Centre, Ospedale S. Antonio Abate, , ASST Valle Olona, ; Gallarate, Italy
[13
]GRID grid.413172.2, Headache Centre, Division of Neurology and Stroke Unit, , “A. Cardarelli” Hospital, ; Naples, Italy
[14
]GRID grid.448878.f, ISNI 0000 0001 2288 8774, Sechenov First Moscow State Medical University (Sechenov University), ; Moscow, Russian Federation
[15
]GRID grid.413628.a, ISNI 0000 0004 0400 0454, Southwest Neurology Audit and Research group (SoNAR), Department of Neurology, , Derriford Hospital, ; Plymouth, PL6 8DH UK
[16
]GRID grid.267362.4, ISNI 0000 0004 0432 5259, Department of Neurology, , Alfred Health, ; Melbourne, VIC Australia
[17
]GRID grid.410718.b, ISNI 0000 0001 0262 7331, Department of Neurology, West German Headache Center, , University hospital Essen, ; Essen, Germany
[18
]GRID grid.4491.8, ISNI 0000 0004 1937 116X, Military University Hospital Prague, Department of Neurology, , 1st Faculty of Medicine Charles University, ; Prague, Czech Republic
[19
]GRID grid.4491.8, ISNI 0000 0004 1937 116X, Motol University Hospital Prague, Department of Neurology, , 2nd Faculty of Medicine Charles University, ; Prague, Czech Republic
[20
]Department of Neurology, “G. Mazzini” Hospital, Teramo, Italy
[21
]Department of Neurology, “F. Renzetti” Hospital, Lanciano, Chieti, Italy
[22
]Department of Neurology, “S. Pio da Pietrelcina” Hospital, Vasto, Chieti, Italy
[23
]GRID grid.412451.7, ISNI 0000 0001 2181 4941, Headache Center, Geriatrics Clinic, Department of Medicine and Science of Aging and
Center for Advanced Studies and Technology (CAST), , G. D’Annunzio University, ; Chieti, Italy
[24
]GRID grid.412469.c, ISNI 0000 0000 9116 8976, Universitätsmedizin Greifswald, ; Greifswald, Germany
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