From the Departments of Pediatrics and Neurology/Neurosurgery (M.O.), McGill University, Montréal, Canada; Departments of Clinical Neurosciences, Psychiatry, Pediatrics, and Community Health Sciences (T.P.), Cumming School of Medicine, University of Calgary, Canada; Department of Pediatrics (Neurology) (Y.-H.M.), Northwestern University Feinberg School of Medicine, Chicago, IL; Neurology Department (S.P.), Southern California Permanente Medical Group, Kaiser, Los Angeles; Division of Neurology (L.B.), Children's Hospital of Philadelphia, PA; Department of Neurology (D.G.), Charleston Area Medical Center, WV; Division of Neurology (A.D.H.), Cincinnati Children's Hospital Medical Center, OH; Department of Neuroscience and Spine (N.L.), St. Anthony Hospital-Centura Health, Lakewood, CO; University of Louisville Comprehensive Headache Program and University of Louisville Child Neurology Residency Program (M.S.), KY; Division of Neurology, NeuroDevelopmental Science Center (M.C.V.), Akron Children's Hospital, OH; Rochester (E.M.G.), NY; St. Paul (E.L.), MN; O'Fallon (H.Z.), MO; Division of Neurology (M.Y.), Children's Hospital Colorado, Aurora; and Department of Neurology (K.M.), Mayo Clinic, Rochester, MN.