Fu, C., Luan, C., Liu, H., Wang, W., Zhou, X., Jia, Y., Ding, B., Zhang, L., Yuan, L., Niu, Z. (2026). An ultrasound-based artificial intelligence framework for difficult airway prediction: A two-model, three-step decision framework. PLoS ONE. https://doi.org/10.1371/journal.pone.0342339