Shining light on knee osteoarthritis: an overview of vitamin D supplementation studies - Zhang, Di; Ye, Miaoyu; Xu, Yao; Jiang, Luyu; Hu, Yanmei; Zhang, Qi; Han, Xiao; Dai, Qian; Qian, Junhui; Luo, Jian; Yuan, Qiang (Frontiers in Medicine, 2025)