5 Department of Neurology and Ophthalmology, Michigan State University College of Human Medicine, East Lansing, Michigan, USA.
6 Department of Neurology, Weill Cornell Medicine, New York, New York, USA.
7 Department of Psychiatry, University of Illinois at Chicago, Chicago, Illinois, USA.
8 Department of Neurology, DKD Klinik Wiesbaden, Wiesbaden, Germany.
9 Department of Neurology, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
10 Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain.
11 Department of Medicine, Headache and Neurological Pain Research Group, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.
12 Department of Pediatrics, Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.
13 Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
14 Headache Center and Division of Behavioral Medicine and Clinical Psychology, Cincinati Children's Hospital, Cincinnati, Ohio, USA.
15 Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.
16 Department of Anesthesia, Critical Care & Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.