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Veering MM, Jonkman EJ, Poortvliet DC, De Weerd AW, Tans JT, John ER.Veering MM, et al. Among authors: poortvliet dc.Electroencephalogr Clin Neurophysiol. 1986 Nov;64(5):383-93. doi: 10.1016/0013-4694(86)90071-4.Electroencephalogr Clin Neurophysiol. 1986.PMID: 2428588