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Steffens AB, Strubbe JH, Balkan B, Scheurink AJ.Steffens AB, et al. Among authors: balkan b.Brain Res Bull. 1991 Sep-Oct;27(3-4):505-10. doi: 10.1016/0361-9230(91)90150-i.Brain Res Bull. 1991.PMID: 1959053Review.