1Division of Pediatric Neurology, Oregon Health & Science University, Portland, OR, USA

2Division of Pediatric Neurology, Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, USA

3Division of Child Neurology, Department of Neurology, Stanford University School of Medicine, Palo Alto, CA, USA

4Division of Neurology, Department of Pediatrics, University of Missouri Kansas City, Kansas City, MO, USA

5Division of Pediatric Neurology, Department of Neurology, School of Medicine, Washington University in St Louis and St Louis Children's Hospital, St Louis, MO, USA

6Division of Child Neurology, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA

Jenny Wilson, Division of Pediatric Neurology, Oregon Health & Science University, 707 SW Gaines St, MC CDRC-P, Portland, OR 97239, USA. Email: [email protected]