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. 2019 Apr 3;127(4):046001. doi: 10.1289/EHP4386

Figure 1.

Figure 2 is a flowchart describing the number of studies included and/or excluded at each stage of review. The flowchart shows that of 21,638 studies obtained, 54 human, 46 rodent, and 50 reviews were included.

Flowchart of studies through the review process. This describes the number of studies evaluated at each step of the review process. “Hand ID” are the studies identified by scanning reference lists of included studies. Priority-ranked studies were screened at the title and abstract level in Sciome Workbench for Interactive computer-Facilitated Text-mining (SWIFT) Active Screener. Studies were excluded if they did not pertain to prenatal or very early life exposures and autism in humans or rodent models. At the full-text level, studies were excluded if there was not exposure to environmental chemicals prior to 2 months of age in humans or 14 d in rodents. *Note: Reasons for exclusion at the full-text level can be found in Excel Table S2.