1 From the Division of Child Neurology (G.L.H.), Nationwide Children's Hospital and The Ohio State University, Columbus; and Division of Child and Adolescent Neurology (K.J.M.), Mayo Clinic, Rochester, MN. geoffrey.heyer@nationwidechildrens.org.
2 From the Division of Child Neurology (G.L.H.), Nationwide Children's Hospital and The Ohio State University, Columbus; and Division of Child and Adolescent Neurology (K.J.M.), Mayo Clinic, Rochester, MN.