Low preoperative serum creatinine levels are associated with poor prognosis in patients with hepatocellular carcinoma after liver resection: a multicenter study. - Qin L; Qiu ZC; Xie F; Zhang Y; Yu Y; Leng SS; Chen TH; Wang ZX; Xu YQ; Dai JL; Wen TF; Li C (BMC gastroenterology, 2025)