Associations of Red Blood Cell Distribution Width‐Derived Indicators and Their Longitudinal Dynamic Trajectories With Mortality Risk in Critically Ill Patients With Pulmonary Hypertension. - He, Anxin; Lu, Yanfei; Liu, Xiang; Liang, Jingyi; Fan, Xutong; Luo, Miao (Pulmonary Circulation, 2026)