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Ari S Zeldin, MD, FAAP, FAAN Staff Pediatric Neurologist, Naval Medical Center San Diego

Ari S Zeldin, MD, FAAP, FAAN is a member of the following medical societies: American Academy of Neurology, American Academy of Pediatrics, Child Neurology Society

Disclosure: Nothing to disclose.

Alicia T F Bazzano, MD, PhD, MPH Clinical Faculty, Division of Pediatric Emergency Medicine, Harbor/UCLA Medical Center; Chief Physician, Westside Regional Center

Alicia T F Bazzano, MD, PhD, MPH is a member of the following medical societies: Alpha Omega Alpha, American Academy of Pediatrics, American Public Health Association, American Society for Bioethics and Humanities

Disclosure: Nothing to disclose.

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Received salary from Medscape for employment. for: Medscape.

Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP, FANA Professor of Pediatrics, Neurology, Neurosurgery, and Psychiatry, Medical Director, Tulane Center for Autism and Related Disorders, Tulane University School of Medicine; Pediatric Neurologist and Epileptologist, Ochsner Hospital for Children; Professor of Neurology, Louisiana State University School of Medicine

Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP, FANA is a member of the following medical societies: American Academy for Cerebral Palsy and Developmental Medicine, American Academy of Neurology, American Academy of Pediatrics, American Epilepsy Society, American Medical Association, American Neurological Association, Association of Military Surgeons of the US, Child Neurology Society, Southern Pediatric Neurology Society

Disclosure: Nothing to disclose.

The authors and editors of Medscape Reference gratefully acknowledge the contributions of previous author Karen H Harum, MD to the development and writing of this article.

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