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Sahakian AV, Ropella KM, Baerman JM, Swiryn S.Sahakian AV, et al. Among authors: ropella km.IEEE Eng Med Biol Mag. 1990;9(1):25-8. doi: 10.1109/51.62899.IEEE Eng Med Biol Mag. 1990.PMID: 18238312