Economic evaluation of school scoliosis screening in Gannan Tibetan autonomous prefecture, Gansu Province: a cost-utility analysis based on decision tree-Markov model. - Yang S; Wang J; Miao P; Zhang C; Huang J; Yuan X; Zhang Y; Dou X; Zhang Z; Liu Z; Duan J; Xu X; et al. (Frontiers in public health, 2026)