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Johnson MH, Siddons F, Frith U, Morton J.Johnson MH, et al. Among authors: frith u.Dev Med Child Neurol. 1992 Apr;34(4):316-20. doi: 10.1111/j.1469-8749.1992.tb11435.x.Dev Med Child Neurol. 1992.PMID: 1572517
Frith U, Happé F.Frith U, et al.Philos Trans R Soc Lond B Biol Sci. 1994 Oct 29;346(1315):97-104. doi: 10.1098/rstb.1994.0133.Philos Trans R Soc Lond B Biol Sci. 1994.PMID: 7886159Review.