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*  Journal of Public Health and Epidemiology - impact of environmental factors on the prevalence of autistic disorder after 1979
Increased paternal age and DSM revisions were not related to rising autistic disorder prevalence. Key words: Autism disorder, ... while no relationship was found between paternal age or Diagnostic and Statistical Manual (DSM) revisions and autistic disorder ... The children vaccinated with MMRII, Varicella and Hepatitis A vaccines varied from 19 to 35 months of age at the time of ... The live births, grouped by father's age, were from the US and Australia. ...
http://academicjournals.org/journal/JPHE/article-abstract/C98151247042