Regression in Autism: Prevalence and Associated Factors in the CHARGE Study

From the Medical Investigation of Neurodevelopmental Disorders (M.I.N.D.) Institute, University of California, Davis, Sacramento, Calif (Dr Hansen, Dr Ozonoff, Ms Krakowiak, Dr Angkustsiri, Dr Jones, Dr Deprey, Ms Le, and Dr Hertz-Picciotto); Department of Pediatrics, School of Medicine, University of California, Davis, Sacramento, Calif (Dr Hansen and Dr Angkustsiri); Department of Psychiatry and Behavioral Sciences, School of Medicine, University of California, Davis, Sacramento, Calif (Dr Ozonoff); Division of Epidemiology, Department of Public Health Sciences, School of Medicine, University of California, Davis, Sacramento, Calif (Ms Krakowiak, Dr Jones, and Dr Hertz-Picciotto); and Division of Research, Kaiser Permanente Northern California, Oakland, Calif (Dr Croen)

Received 30 March 2007; accepted 28 August 2007.

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