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DOI work
MICHAEL C. STEVENS, DEBORAH A. FEIN, MICHELLE DUNN, DORIS ALLEN, LYNN H. WATERHOUSE, CARL FEINSTEIN, ISABELLE RAPIN (2000). Subgroups of Children With Autism by Cluster Analysis: A Longitudinal Examination. Journal of the American Academy of Child & Adolescent Psychiatry, 39(3), 346-352. Elsevier BV.
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