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

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EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.

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Figure 2 is a bar graph showing publications by year. It plots number of publications (y-axis) ranging between 0 and 16 across the years 1999 to 2017 (x-axis) for epidemiological studies, experimental rodent studies, and reviews. — Number of studies published by year and type (1999–2017). The number of studies in each evidence stream are shown by year of publication. Note: Five experimental rodent studies published before 1999 are not shown in this figure. One paper was published in each of the following years: 1974, 1979, 1984, 1985, and 1995.