Non-linear association between CD4+ T-cell counts and mortality risk in people living with HIV: evidence from a 10-year cohort study - Sun, Ruohan; Jia, Huangchao; Kang, Qiujia; Ma, Yanmin; He, Zichen; Ma, Xiuxia; Yuan, Jun; Guo, Huijun; Xu, Qianlei; Jin, Yantao (Frontiers in Medicine, 2025)