Development and clinical application of a novel urinary cortisol extraction agent. - Wang, Chengxue; Wang, Qian; Yuan, Wenting; Jia, Zichao; Dong, Lizhen; Chai, Yamin; Cai, Qinzhen; Yuan, Chunhui; Cao, MingFeng; Luo, Wei (Analytical & Bioanalytical Chemistry, 2025)