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Cannon TD, Yolken R, Buka S, Torrey EF; Collaborative Study Group on the Perinatal Origins of Severe Psychiatric Disorders.Cannon TD, et al.Biol Psychiatry. 2008 Nov 1;64(9):797-802. doi: 10.1016/j.biopsych.2008.04.012. Epub 2008 May 16.Biol Psychiatry. 2008.PMID: 18486103Free PMC article.