Association between multi-metal co-exposure and thyroid cancer risk in Shanxi, China: A case-control study - Yifan Xie; Yuanzheng Ding; Yuli Gao; Ke Yang; Yubo Zhang; Lei Li; Ying Wang; Jin Zhang; Shujing Li; Liangpo Liu; Yi Gao; Jing Liu (PLoS ONE, 2026)