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. 2018 Mar 29;126(3):034002. doi: 10.1289/EHP3188

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Photograph of workers in a Chinese car factory — A study of more than 27,000 retired auto manufacturing employees found evidence that titanium exposure may increase the risk of CHD. However, with a median plasma titanium concentration of $30.32 µ g / L$ among participants with CHD, it is unclear how their exposure levels compare with levels in the general population. Image: © STR/AFP/Getty Images.