Relationship between baseline platelet-to-red blood cell distribution width ratio and all-cause mortality in non-traumatic subarachnoid hemorrhage: A retrospective analysis of the MIMIC-IV database - Yang Liu; Yi Shi; Pengzhao Zhang; Mengyuan Xu; Jiaqi Zhang; Jing Xia; Shaojie Guo; Gaofeng Li; Guang Feng (PLoS ONE, 2025)