Associations of multimorbidity with mortality, hospital stay, and hospitalization costs in Chinese surgical patients: a retrospective cohort study. - Zhao, Xu; Gao, Shaowei; Kamarajah, Sivesh Kathir; Hu, Lin; Ma, Wudi; Lei, Wenbin; Cheng, Chao; He, Mian; Morgese, Ciro; Cheng, Karkeung; Chen, Lingwu; Feng, Xia (BMC Anesthesiology, 2025)