1 University of California at Santa Cruz, Santa Cruz, CA, 95064, USA.
2 Stanford University School of Medicine, Palo Alto, CA, 92405, USA.
3 Division of Child Neurology, Department of Neurology, Stanford University Hospital and Clinics, Palo Alto, CA, 94305, USA. jsantoro@stanford.edu.
4 Lucile Packard Children's Hospital at Stanford, Stanford University Hospital and Clinics, 730 Welch Road, Palo Alto, CA, 94304, USA. jsantoro@stanford.edu.