Analysis of risk factors for intraoperative bleeding in patients with Siewert type II esophagogastric junction adenocarcinoma treated by two minimally invasive surgeries and its influence on prognosis: a retrospective study - Lan, Yang; Shen, Jian; Liu, Ruqian; Jiang, Kai; Qiu, Mingyuan; Wang, Shuai (Frontiers in Oncology, 2024)