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  1. Excluded Studies - Interventions Targeting Sensory Challenges in Children With Autism Spectrum Disorder—An Update - ... 
    https://www.ncbi.nlm.nih.gov/books/NBK448045
    ... acid (HPHPA), an abnormal phenylalanine metabolite of Clostridia spp. in the gastrointestinal tract, in urine samples from ... et al. Serological and molecular identification of Legionella spp. isolated from water and surrounding air samples in ...
  2. Excluded Studies - Medical Therapies for Children With Autism Spectrum Disorder—An Update - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK448263
    ... acid (HPHPA), an abnormal phenylalanine metabolite of Clostridia spp. in the gastrointestinal tract, in urine samples from ... et al. Serological and molecular identification of Legionella spp. isolated from water and surrounding air samples in ...