1 Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
2 Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
3 Department of Pediatric and Neurology, McGill University, Montréal, Canada.
4 Department of Neurosurgery, McGill University, Montréal, Canada.
5 Department of Clinical Neurosciences, Psychiatry, Pediatrics and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Canada.
6 Department of Pediatrics (Neurology), Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
7 Neurology Department, Southern California Permanente Medical Group, Kaiser, Los Angeles, CA, USA.
8 Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
9 Department of Neurology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
10 Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
11 Department of Neurology, Charleston Area Medical Center, Charleston, WV, USA.
12 Department of Neuroscience and Spine, St. Anthony Hospital-Centura Health, Lakewood, CO, USA.
13 University of Louisville Comprehensive Headache Program and University of Louisville Child Neurology Residency Program, Louisville, KY, USA.
14 Division of Neurology, NeuroDevelopmental Science Center, Akron Children's Hospital, Akron, OH, USA.
15 Rochester, NY, USA.
16 St. Paul, MN, USA.
17 O'Fallon, MO, USA.
18 Division Neurology, Children's Hospital Colorado, Aurora, CO, USA.
19 Department of Neurology, Mayo Clinic, Rochester, MN, USA.
20 Department of Neurology, University of San Francisco, San Francisco, CA, USA.