Mercury, Autoimmunity, and Environmental Factors on Cheyenne River Sioux Tribal Lands

<table>Map of arsenic sampling conducted by USEPA and CRST DENR. Concentrations of arsenic in sediment exceeding 100 ppm are marked with a burst pattern. Exposure-relevant sites are labeled with activities frequently conducted in those areas.</table>

Autoimmune Diseases

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Figure 2

Figure 2: Mercury, Autoimmunity, and Environmental Factors on Cheyenne River Sioux Tribal Lands 