Seasonal patterns, sources, and health risks of halogenated, nitro and oxygenated PAHs in PM2.5 from a coastal city in North China - Yifan Li; Pengcheng Wang; Feijie Gong; Shujun Bie; Anan Qi; Qi Huang; Zhentong Sun; Lingxiao Yang; Wenxing Wang (Atmospheric Pollution Research, 2026)