“…Definitions of ASD varied among these studies, including infantile autism (23,25,26,29,34,35), Asperger's syndrome (28,34), pervasive developmental disorder-not otherwise specified (28), and/or ASD in general (24,27,(30)(31)(32)(33). Measures used to confirm ASD also differed, including Diagnostic and Statistical Manual of Mental Disorders (III, IV, or V) criteria (23,27,30,32,35), survey responses (28,29), International Classification of Diseases coding (24), Autism Diagnostic Observation Schedule or Autism Diagnostic Interview-Revised (26,31), or not clearly stated (25,33,34). Measures used to confirm CD included serological positivity and/or biopsy-confirmation (23,(25)(26)(27)(30)(31)(32)(33)(34), survey-responses (28,29), or not clearly stated (24,35).…”