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Engel J Jr, Wiebe S, French J, Sperling M, Williamson P, Spencer D, Gumnit R, Zahn C, Westbrook E, Enos B; Quality Standards Subcommittee of the American Academy of Neurology; American Epilepsy Society; American Association of Neurological Surgeons.Engel J Jr, et al.Neurology. 2003 Feb 25;60(4):538-47. doi: 10.1212/01.wnl.0000055086.35806.2d.Neurology. 2003.PMID: 12601090Review.