An ultrasound-based artificial intelligence framework for difficult airway prediction: A two-model, three-step decision framework. - Fu, Chunmeng; Luan, Cunyuan; Liu, Huabo; Wang, Wenfei; Zhou, Xia; Jia, Yuanfang; Ding, Bing; Zhang, Lei; Yuan, Li; Niu, Zejun (PLoS ONE, 2026)