The synergistic effect of ambient PM2.5 and psychosocial stress on cardiac health: evidence from a multi-center panel study - Yang Lan; Xianggui Li; Jian Lei; Weidong Zhang; Yunxing Jiang; Kai Wang; Lei Lei; Cuiyao Xie; Yu You; Jiaqi Zhu; Tong Wu; Jie Yan; et al. (Environmental Research, 2026)