Development and validation of a nomogram for obesity and related factors to detect gastric precancerous lesions in the Chinese population: a retrospective cohort study - Shi, Chang’e; Tao, Rui; Wang, Wensheng; Tang, Jinzhi; Dou, Zhengli; Yuan, Xiaoping; Xu, Guodong; Liu, Huanzhong; Chen, Xi (Frontiers in Oncology, 2024)