Identification of intraoperative hypoxemia and hypoproteinemia as prognostic indicators in anastomotic leakage post-radical gastrectomy: an 8-year multicenter study utilizing machine learning techniques - Liu, Yuan; Zhao, Songyun; Shang, Xingchen; Shen, Wei; Du, Wenyi; Zhou, Ning (Frontiers in Oncology, 2024)