Non-linear relationship between basal serum albumin concentration and cardiac arrest in critically ill patients with end-stage renal disease: a cross-sectional study oleh Bo Li, Rui Yan, Yong-Qin Zeng, Zuo-An Qin, Zi-Wei Guo, Hai-Yan Yu, Rui-Xue Chen, Ying-Qian Tang, Ke-Jin Hu, Cheng-Jing Guan