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Placencia M, Sander JW, Roman M, Madera A, Crespo F, Cascante S, Shorvon SD.Placencia M, et al. Among authors: sander jw.J Neurol Neurosurg Psychiatry. 1994 Mar;57(3):320-5. doi: 10.1136/jnnp.57.3.320.J Neurol Neurosurg Psychiatry. 1994.PMID: 8158180Free PMC article.