U-Shaped association between apolipoprotein A1 and serum uric acid levels in patients with osteoporotic fractures: a cross-sectional study - Lin, Guo-Ji; Guo, Shao-Han; Liang, Jia-Qi; Gong, Ya-Qin; Jin, Jian; Li, Chong; Lu, Ke (Frontiers in Endocrinology, 2025)