Maximal inspiratory diaphragmatic ultrasound predicts postoperative pulmonary complications after upper abdominal surgery. - Yan, Ting; Yu, Qing; Li, Chun-Qing; Xu, Zhen-Zhen; Ma, Jia-Hui; Xie, Min; Zhu, Sai-Nan; Wang, Dong-Xin; Li, Shuang-Ling (Annals of Intensive Care, 2025)