Relationship between albumin-corrected anion gap and lumbar spine bone mineral density: a cross-sectional study - Liu, Aiguo; Ying, Ting; Deng, Shuang; Wang, Chenxu; Zhao, Ziwen; Zhang, Sitong; Xiao, Han; Yi, Chengqing; Li, Dejian (Frontiers in Aging, 2025)